Dept of Physics

DEPARTMENT OF PHYSICS

Researcher : Bao Y

List of Research Outputs

Shen S.Q., Bao Y., Ma M., Xie X.C. and Zhang F.C., Resonant spin Hall conductance in quantum Hall systems lacking bulk and structural inversion symmetry, Physical Review B. New York, The American Physical Society, 2005, 71: 155316:1-8.

Researcher : Beling CD

Project Title:	Centre for optical and positron characterization of defects
Investigator(s):	Beling CD, Fung SHY, Ling FCC
Department:	Physics
Source(s) of Funding:	Central Allocation Vote - Major Equipment Project
Start Date:	03/2001

Abstract:

To provide the University of Hong Kong with a well-equipped center for studying point defects in semiconductor and other industrially related materials - a center that's expertise and equipment would also be made available to other universities in Hong Kong according to need.

Project Title:	Centre for optical and positron characterization of defects
Investigator(s):	Beling CD, Fung SHY, Ling FCC
Department:	Physics
Source(s) of Funding:	Vice-Chancellor's Sub-Committee on Equipment
Start Date:	03/2001

Abstract:

Project Title:	Developing VE-PALS (variable energy positron annihilation lifetime spectroscopy)
Investigator(s):	Beling CD
Department:	Physics
Source(s) of Funding:	Seed Funding Programme for Basic Research
Start Date:	10/2002

Abstract:

To set up a means of taking PALS spectra on solid-state samples using the HKU magnetically guided positron beam.

Project Title:	Studies on positron field assisted moderation
Investigator(s):	Beling CD, Ling FCC
Department:	Physics
Source(s) of Funding:	Merit Award for RGC CERG Funded Projects
Start Date:	09/2003

Abstract:

To make some positive step towards achieving a successful Positron Field Assisted Moderator (PFAM) by carrying out studies on clean initmate metal-semiconductor junctions; to conduct PFAM investigations only on the following semiconductor substrates: GaAs, GaN and Sic possibly using semi-insulating forms of material; to use the most advanced diagnostic positron spectroscopy techniques, including Coincidence Doppler Broadening Spectroscopy (CDBS) to study any adverse positron trapping at the metal-semiconductor interface.

Project Title:	Studies on positron field assisted moderation
Investigator(s):	Beling CD, Ling FCC
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	09/2003

Abstract:

Project Title:	Developing Variable Energy Positron Annihilation Lifetime Spectroscopy
Investigator(s):	Beling CD
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	09/2004

Abstract:

To make some positive step towards achieving a successful Positron Field Assisted Moderator (PFAM) by carrying out a series of positron annihilation studies on clean intimate metal-semiconductor junctions; to conduct PFAM investigations on the following semiconductor substrates: GaAs, GaP, GaN and SiC possibly using semi-insulating forms or material; to use the most advanced diagnostic positron spectroscopy techniques, including Coincidence Doppler Broadening Spectroscopy (CDBS) to study any adverse positron trapping at the metal-semiconductor interface.

Project Title:	Developing Variable Energy Positron Annihilation Lifetime Spectroscopy
Investigator(s):	Beling CD
Department:	Physics
Source(s) of Funding:	Merit Award for RGC CERG Funded Projects
Start Date:	01/2005

Abstract:

Refer to hard copy

List of Research Outputs

Chen X., Ling F.C.C., Gong M., Fung S.H.Y., Beling C.D., Brauer G., Anwand W. and Skorupa W., Anomalous behaviors of E₁/E₂ deep level defects in 6H silicon carbide, Applied Physics Letters. New York, American Institute of Physics, 2005, 86: 031903:1-3.

Chen X., Ling F.C.C., Fung S.H.Y. and Beling C.D., Electrically active deep level defects in 6H silicon carbide, Tenth National Seminar on Crystal Growth, Indian Association for Crystal Growth. Tamilnadu, Kongu Engineering College, 2005, 4.

Huang Y., Chen X., Fung S.H.Y., Beling C.D., Ling F.C.C., Dai X. and Xie M.H., Current transport property of n-GaN/n-6H-SiC heterojunction: Influence of interface states, Applied Physics Letters. New York, American Institute of Physics, 2005, 86: 122102:1-3.

Huang Y., Chen X., Fung S.H.Y., Beling C.D. and Ling F.C.C., Spatial characterization of a 2 in GaN wafer by Raman spectroscopy and capacitance-voltage measurements, Journal of Physics D: Applied Physics. Bristol, IOP Publishing Limited, 2004, 37: 2814-2818.

Huang Y., Chen X., Fung S.H.Y., Beling C.D., Ling F.C.C., Wei Z., Xu S. and Zhi C., The depth-profiled carrier concentration and scattering mechanism in undoped GaN film grown on sapphire, Journal of Applied Physics. New York, American Institute of Physics, 2004, 96: 1120-1126.

Lam C.H., Lam T.W., Ling F.C.C., Fung S.H.Y., Beling C.D., Hang D.S. and Weng H.M., Positron lifetime studies on 8 MeV electron-irradiated n-type 6H silicon carbide, Journal of Physics: Condensed Matter. Bristol, IOP Publishing Limited, 2004, 16: 8409-8419.

Ling F.C.C., Chen X., Fung S.H.Y., Beling C.D., Brauer G., Anwand W., Skorupa W. and Gong M., Deep level defects E₁/E₂ in n-type 6H silicon carbide induced by electron radiation and He-implantation, Physics of Semiconductors: 27th International Conference on the Physics of Semiconductors, Flagstaff, Arizona, 26-30 July 2004. New York, American Institute of Physics, 2005, 99-100.

Ling F.C.C., Chen X., Fung S.H.Y., Beling C.D., Gong M., Ge W.K., Wang J.N., Brauer G., Anwand W. and Skorupa W., Deep level defects in 6H silicon carbide, 六方碳化硅中的深能级缺陷, Physics. 物理, Beijing, Chinese Physical Society, 2004, 33: 786-790.

Ling F.C.C., Lui M.K.P., Ma S.K.M., Chen X., Fung S.H.Y. and Beling C.D., Nature of the acceptor responsible for p-type conduction in liquid encapsulatedCzochralski-grown undoped gallium antimonide, Applied Physics Letters. New York, American Institute of Physics, 2004, 85: 384-386.

Ma S.K.M., Lui M.K.P., Ling F.C.C., Fung S.H.Y., Beling C.D., Li K.F., Cheah K.W., Gong M., Hang H.S. and Weng H.M., Electron irradiated liquid encapsulated Czochralski grown undoped gallium antimonide studied by positron lifetime spectroscopy and photoluminescence, Journal of Physics: Condensed Matter. Bristol, IOP Publishing Limited, 2004, 16: 6205-6212.

Naik P.S., Cheung C.K., Beling C.D. and Fung S.H.Y., A real-time S-parameter imaging system, Acta Physica Polonica A. Poland, The Polish Physical Society, 2005, 107: 761-768.

Wang K., Wang R., Fung S.H.Y., Beling C.D., Chen X., Huang Y., Li S., Xu S.J. and Gong M., Film thickness degradation of Au/GaN Schottky contact characteristics, Materials Science and Engineering B. Amsterdam, Elsevier B.V., 2005, 117: 21-25.

Wang R., Beling C.D., Fung S.H.Y., Djurisic A., Ling F.C.C., Kwong C.Y. and Li S., Influence of annealing temperature and environment on the properties of indium tin oxide thin films, Journal of Physics D: Applied Physics. Bristol, IOP Publishing Limited, 2005, 38: 2000-2005.

Wang R., Beling C.D., Fung S.H.Y., Djurisic A., Ling F.C.C. and Li S., Influence of gaseous annealing environment on the properties of indium-tin-oxide thin films, Journal of Applied Physics. New York, American Institute of Physics, 2005, 97: 033504:1-5.

Weng H., Ling F.C.C., Beling C.D., Fung S.H.Y., Cheung C.K., Kwan P.Y.R. and Hui I.P., Tungsten mesh as positron transmission moderator in a monoenergetic positron beam, Nuclear Instruments and Methods in Physics Research B. Amsterdam, Elsevier B.V., 2004, 225: 397-401.

Researcher : Cai X

List of Research Outputs

Cai X., Djurisic A., Xie M.H., Liu H., Zhang X.X., Zhu J.J. and Yang H., Ferromagnetism in Mn and Cr doped GaN by thermal diffusion, Materials Science and Engineering B. Amsterdam, Elsevier B.V., 2005, 117: 292-295.

Cai X., Djurisic A., Xie M.H., Liu H., Zhang X.X., Zhu J.J., Yang H. and Leung Y.H., Magnetic doping and characterization of n-type GaN, AIP Conference Proceedings. New York, American Institute of Physics, 2005, 772: 319-320.

Cai X., Cheng K.W., Oey C.C., Djurisic A., Chan W.K., Xie M.H. and Chui P.C., Porous metallic films fabricated by self-assembly of gold nanoparticles, Thin Solid Films. Amsterdam, Elsevier B.V., 2005, 491: 66-70.

Researcher : Cao Y

List of Research Outputs

Cao Y., Xu S., Lu W., Dai X., Chan Y.F., Wang N., Liu Y., Wu H.S., Xie M.H. and Tong S.Y., In situ revelation of a zinc-blende InN wetting layer during Stranski-Krastanov growth on GaN(0001) by molecular-beam epitaxy, Physical Review B. New York, The American Physical Society, 2005, 71: 155322:1-5.

Liu Y., Xie M.H., Cao Y., Wu H.S. and Tong S.Y., A study of In_xGa_1-xN growth by reflection high-energy electron diffraction, Journal of Applied Physics. New York, American Institute of Physics, 2005, 97: 023502:1-5.

Liu Y., Cao Y., Wu H.S., Xie M.H. and Tong S.Y., Coherent and dislocated three-dimensional islands of In_xGa_1-xN self-assembled on GaN(0001) during molecular-beam epitaxy, Physical Review B (Brief Reports). New York, The American Physical Society, 2005, 71: 153406:1-4.

Researcher : Chan YK

List of Research Outputs

Chan Y.K. and Cheng K.S., Radiation of strange stars, Journal of the Korean Physical Society. 2004, 45: S143-S147.

Chan Y.K., Strange star cooling. Hong Kong, The University of Hong Kong, 2005, 1-89.

Researcher : Chan YK

List of Research Outputs

Chan Y.K. and Cheng K.S., Radiation of strange stars, Journal of the Korean Physical Society. 2004, 45: S143-S147.

Chan Y.K., Strange star cooling. Hong Kong, The University of Hong Kong, 2005, 1-89.

Researcher : Chau HF

Project Title:	Cryptanalysis of Certain Quantum Cryptographic Applications
Investigator(s):	Chau HF
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	10/2004

Abstract:

To study the interplay and tradeoff between efficiency, error tolerable rate and resources requirements in various quantum crytographic applications. I begin the study by first focusing on quantum key distribution. The outcome is essential in devising new quantum cryptographic protocols that suit specific applications.

Project Title:	Cryptanalysis of Certain Quantum Cryptographic Applications
Investigator(s):	Chau HF
Department:	Physics
Source(s) of Funding:	Merit Award for RGC CERG Funded Projects
Start Date:	01/2005

Abstract:

Refer to hard copy

List of Research Outputs

Chau H.F., Unconditionally secure key distribution in higher dimensions by depolarization, IEEE Transactions on Information Theory. IEEE, 2005, 51: 1451-1468.

Chau H.F., 手機放微波爐為何打得通?, 明報, Hong Kong, 明報, 2004, E2.

Chau H.F., 農曆原是陰陽合曆, 明報, Hong Kong, 明報, 2004, D15.

Chau H.F., 新課程有助高新科技經濟嗎﹖, 信報, Hong Kong, 信報, 2005, 14.

Chau H.F., 堅尼系數貧富懸殊指標, 明報, Hong Kong, 明報, 2005, D19.

Chau H.F., 三角視差法 ― 測量近距離星星, 明報, Hong Kong, 明報, 2005, D15.

Cheng K.S., Chau H.F., Lee K.M. and Chan K.H., Nature of the universe CD ROM year 2004 edition. Hong Kong, Department of Physics, HKU and Hong Kong Space Museum, HKSAR, 2004.

Chong S.N. and Chau H.F., 七彩繽紛肥皂泡, 明報, Hong Kong, 明報, 2005, D19.

Ho K.H., Man W.C., Chow F.K. and Chau H.F., Memory is relevant in the symmetric phase of the minority game, Physical Review E. New York, The American Physical Society, 2005, 71: 066120: 1-5.

Ho K.H., Chow F.K. and Chau H.F., Wealth inequality in the minority game, Physical Review E. New York, The American Physical Society, 2004, 70: 066110:1-7.

Lo H.K., Chau H.F. and Ardehali M., Efficient quantum key distribution scheme and a proof of its unconditional security, Journal of Cryptology. International Association for Cryptologic Research, 2005, 18: 133-165.

Tam W.S., Pun J.C.S. and Chau H.F., The quality of night sky in Hong Kong, Hong Kong, The University of Hong Kong, 2004, 1-37.

Tsang W.N. and Chau H.F., 天空會變色﹖, 明報, Hong Kong, 明報, 2005, D15.

Researcher : Chen X

List of Research Outputs

Chen X., Ling F.C.C., Gong M., Fung S.H.Y., Beling C.D., Brauer G., Anwand W. and Skorupa W., Anomalous behaviors of E₁/E₂ deep level defects in 6H silicon carbide, Applied Physics Letters. New York, American Institute of Physics, 2005, 86: 031903:1-3.

Chen X., Ling F.C.C., Fung S.H.Y. and Beling C.D., Electrically active deep level defects in 6H silicon carbide, Tenth National Seminar on Crystal Growth, Indian Association for Crystal Growth. Tamilnadu, Kongu Engineering College, 2005, 4.

Huang Y., Chen X., Fung S.H.Y., Beling C.D., Ling F.C.C., Dai X. and Xie M.H., Current transport property of n-GaN/n-6H-SiC heterojunction: Influence of interface states, Applied Physics Letters. New York, American Institute of Physics, 2005, 86: 122102:1-3.

Huang Y., Chen X., Fung S.H.Y., Beling C.D. and Ling F.C.C., Spatial characterization of a 2 in GaN wafer by Raman spectroscopy and capacitance-voltage measurements, Journal of Physics D: Applied Physics. Bristol, IOP Publishing Limited, 2004, 37: 2814-2818.

Huang Y., Chen X., Fung S.H.Y., Beling C.D., Ling F.C.C., Wei Z., Xu S. and Zhi C., The depth-profiled carrier concentration and scattering mechanism in undoped GaN film grown on sapphire, Journal of Applied Physics. New York, American Institute of Physics, 2004, 96: 1120-1126.

Ling F.C.C., Chen X., Fung S.H.Y., Beling C.D., Brauer G., Anwand W., Skorupa W. and Gong M., Deep level defects E₁/E₂ in n-type 6H silicon carbide induced by electron radiation and He-implantation, Physics of Semiconductors: 27th International Conference on the Physics of Semiconductors, Flagstaff, Arizona, 26-30 July 2004. New York, American Institute of Physics, 2005, 99-100.

Ling F.C.C., Chen X., Fung S.H.Y., Beling C.D., Gong M., Ge W.K., Wang J.N., Brauer G., Anwand W. and Skorupa W., Deep level defects in 6H silicon carbide, 六方碳化硅中的深能级缺陷, Physics. 物理, Beijing, Chinese Physical Society, 2004, 33: 786-790.

Ling F.C.C., Lui M.K.P., Ma S.K.M., Chen X., Fung S.H.Y. and Beling C.D., Nature of the acceptor responsible for p-type conduction in liquid encapsulatedCzochralski-grown undoped gallium antimonide, Applied Physics Letters. New York, American Institute of Physics, 2004, 85: 384-386.

Wang K., Wang R., Fung S.H.Y., Beling C.D., Chen X., Huang Y., Li S., Xu S.J. and Gong M., Film thickness degradation of Au/GaN Schottky contact characteristics, Materials Science and Engineering B. Amsterdam, Elsevier B.V., 2005, 117: 21-25.

Researcher : Chen Y

Project Title:	Pairing symmetry, competing orders and local physics in electron-doped high temperature superconductors
Investigator(s):	Chen Y, Wang ZD, Zhang FC
Department:	Physics
Source(s) of Funding:	Seed Funding Programme for Basic Research
Start Date:	02/2004

Abstract:

To investigate the superconductivity and other competing orders, more specially, spin density wave; to investigate the existence of two possible types of superconducting order parameters at different pockets of the Fermi surface; to investigate the local electronic structure around impurities or vortex cores, both local density of states and nuclear magnetic resonance relaxation rate will be calculated.

Project Title:	Theoretical Studies of Electronic States in Electron-doped High Temperature Superconductors
Investigator(s):	Chen Y, Wang ZD, Zhang FC
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	09/2004

Abstract:

The electronic structure of electron-doped cuprates has attracted significant interest both experimentally and theoretically in recent years. Substantial asymmetry exists between the less studied electron-doped and intensively studied hole-doped cuprates. In order to elucidate the mechanism of high temperature superconductivity, it is fundamentally important to clarify the origin of the similarity and the differences between the electron-doped and the hole-doped cuprates.

Project Title:	Theoretical Studies of Electronic States in Electron-doped High Temperature Superconductors
Investigator(s):	Chen Y
Department:	Physics
Source(s) of Funding:	Merit Award for RGC CERG Funded Projects
Start Date:	01/2005

Abstract:

Refer to hard copy

Project Title:	Mixed States in High Temperature Superconductors: Scenario of Competing Orders
Investigator(s):	Chen Y, Zhang FC, Wang ZD
Department:	Physics
Source(s) of Funding:	Seed Funding Programme for Basic Research
Start Date:	04/2005

Abstract:

The electronic structure of mixed states in high temperature superconductors (HTS) has attracted significant interest both experimentally and theoretically for past many years. Many important physical phenomena arise from competing orders, including pseudogap, superconductor-insulator transition, which cannot be explained within a conventional theory. It is well established that the competition between d-wave superconductivity (DSC) and antiferromagnetic (AF) orders plays an essential role in determining the vortex state of HTS. In view of the widely used competing order scenario of the HTS in the mixed state and impurity state, together with the fact that the competing order effect has not been considered in some existing theories relevant to mixed state. In this project, we will focus on the field dependence of the vortex structure, Nernst effect and anomalous Hall effect, which are different from conventional superconductors. We believe the competition between AF and DSC may not only provide a coherent way to understand the vortex structure but also gain new insights on the above-mentioned specific features of the experimental measurements. In terms of the results to be obtained, we attempt to understand profoundly some existing experimental results as well as to suggest new experiments to test our predictions.

List of Research Outputs

Chen Y., Wang Z.D. and Ting C.S., Novel vortex stripe phase under strong magnetic field in high temperature superconductors, International Journal of Modern Physics B. Singapore, World Scientific, 2005, 19: 9-12.

Gan J.Y., Chen Y., Su Z.B. and Zhang F.C., Gossamer superconductivity near antiferromagnetic Mott insulator in layered organic conductors, Physical Review Letters. New York, The American Physical Society, 2005, 94: 067005:1-4.

Xia T., Han Q., Chen Y., Wang Z.D. and Li X.G., Impurity states in superconducting systems with stripe like modulation, International Journal of Modern Physics B. Singapore, World Scientific, 2005, 19: 267-269.

Researcher : Cheng KS

Project Title:	Consequences of spinning down neutron stars: cooling and change of internal properties
Investigator(s):	Cheng KS
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	07/2002
Completion Date:	04/2005

Abstract:

This research aims at studying the properties of rotating neutron stars and their observational consequences. In particular, it includes studying the consequences of the phase transition during the spinning down epoch of neutron stars; understanding how the reduction of gravitational mass affects the orbital decay of the neutron stars; and developing an anisotropic transport equation.

Project Title:	Properties of strange stars and their observational appearance
Investigator(s):	Cheng KS, Usov V.V., Suen W.M.
Department:	Physics
Source(s) of Funding:	Merit Award for RGC CERG Funded Projects
Start Date:	07/2003

Abstract:

To study the emissivity and transport properties of electronmagnetic waves in semi-degenerate and inhomogeneous electron gas of the strange star atmosphere; the thermal emissivity of hot quark surface in electron-positron pairs; to calculate electron-positron pairs more precisely, hopefully with accuracy of ~10% or even higher; to study electromagnetic waves produced by passing the quarks and also the propagation of electromagnetic waves through the electron atmosphere, which is semi-degenerate and inhomogeneous; to study the strange star cooling by taking into account the processes mentioned in (1)-(3). And other processes such as formation of color-flavor locked phase inside the star, chiral symmetry requirement in the boundary, will be included in the cooling calculations; to study the observational consequences of producing strange stars by accretion including how much gravitational and phase transition energy will be released through gravitational and electromagnetic waves. The possible connection between this process and [gamma]-ray bursts will be studied as well.

Project Title:	Properties of strange stars and their observational appearance
Investigator(s):	Cheng KS, Usov V.V., Suen W.M.
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	07/2003

Abstract:

Project Title:	Time variation of fundamental physical constants in theories with extra-dimensions
Investigator(s):	Cheng KS
Department:	Physics
Source(s) of Funding:	Small Project Funding
Start Date:	11/2003

Abstract:

To study in a systematically manner the possibility that the time variability of some fundamental physical constants (the elementary electric charge e, the speed of light c and the gravitational constant G) is due to the presence of the extra dimensions. More specifically, to consider the fundamental constants as some physical fields in a five-dimensional space-time and to examine the effects of such a hypothesis on the four-dimensional space-time.

Project Title:	Transient Gamma-ray Sources: Gamma-ray Bursts and Other Related Astrophysical Phenomena
Investigator(s):	Cheng KS, Huang Y.F., Lu T., Dai Z.G.
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	07/2004

Abstract:

To study (1) the evolution of the postburst fireball and their afterglows under different cases, e.g. effects of dense media, non-uniformity of media, geometry of jets (isotropic or highly collimated?) etc. We will compare the observed light curves and the time dependent multi-wave band spectra of the afterglows with model results. This information should provide very important clues to understand the origin of GRBs. (2) the inverse-Comption scattering in the internal shock can generate TeV photons, which are expected to form electron/positron pairs by collisions with inter-galactic infrared photons. Subsequent collisions between TeV pairs and cosmic microwave photons can cause delayed GeV-GRBs. The delay time scales and the spectra of delayed GeV-GRBs should be detectable for GLAST and provide vital information for the inter-galactic infrared photons as well as inter-galactic magnetic field. (3) some ideas, which we learn from GRBs, can be used to explain other transient gamma-ray phenomena, e.g. Anomalous X-Ray pulsars, Soft Gamma Repeaters and Microquasars, which exhibit some similar activities liek GBRs. For example, they all have jet-like features during the outburst states (flares) and their subsequent radiation processes could be explained in terms of internal/external shock mechanism, which are the mechanisms used to explain the radiation processes of GRBs.

Project Title:	Neutron star- Neutron star collisions
Investigator(s):	Cheng KS, Suen W.M.
Department:	Physics
Source(s) of Funding:	Seed Funding Programme for Basic Research
Start Date:	01/2005

Abstract:

The objective of this program is to develop numerical relativity and apply it to astrophysics that involves strong and dynamical gravitational fields requiring the full Einstein theory for its understanding. In particular we want to apply it to neutron star merger system.

Project Title:	Transient Gamma-ray Sources: Gamma-ray Bursts and Other Related Astrophysical Phenomena
Investigator(s):	Cheng KS
Department:	Physics
Source(s) of Funding:	Merit Award for RGC CERG Funded Projects
Start Date:	01/2005

Abstract:

Refer to hard copy

List of Research Outputs

Chan Y.K. and Cheng K.S., Radiation of strange stars, Journal of the Korean Physical Society. 2004, 45: S143-S147.

Cheng K.S. and Romero G.E., Introduction: A brief history of gamma-ray astronomy, In: Cheng K.S., Romero G.E., Cosmic Gamma-Ray Sources. Amsterdam, Kluwer Academic Pub., 2004, Chapter 1: 1-20.

Cheng K.S. and Harko T.C., Is there any evidence for extra-dimensions or quantum gravity effects from the delayedMeV-GeV photons in GRB 940217?, Astroparticle Physics. Amsterdam, Elsevier B.V., 2004, 22: 297-305.

Cheng K.S., Chau H.F., Lee K.M. and Chan K.H., Nature of the universe CD ROM year 2004 edition. Hong Kong, Department of Physics, HKU and Hong Kong Space Museum, HKSAR, 2004.

Cheng K.S., Harko T.C., Yuan Y.F. and Tang A.P.S., Orbital decay of a binary system consisting of spin-down neutron stars, Astrophysics and Space Science. Netherlands, Kluwer Academic Publishers, 2004, 294: 151-176.

Cheng K.S., Taam R.E. and Wang W., Pulsar wind nebulae and the X-ray emission of nonaccreting neutron stars, The Astrophysical Journal. The American Astronomical Society, 2004, 617: 480-489.

Cheng K.S., Harko T.C. and Wang X.Y., Radiation transport equations in non-Riemannian space-times, Physical Review D. 2005, 71: 103001.

Cheng K.S., Theories of gamma-ray emission from pulsars, In: Cheng K.S., Romero G.E., Cosmic Gamma-Ray Sources. Amsterdam, Kluwer Academic Pub., 2004, Chapter 8: 169-203.

Ertan U. and Cheng K.S., On the radio emission following the August 27 giant flare of SGR 1900+14, New Astronomy. Amsterdam, Elsevier B.V., 2004, 9: 503-507.

Harko T.C. and Cheng K.S., Constraints on extra-dimensions and variable constants from cosmological gamma-ray bursts, Astrophysics and Space Science. Springer, 2005, 297: 319-326.

Harko T.C. and Cheng K.S., Photon emissivity of the electrosphere of bare strange stars, The Astrophysical Journal. The American Astronomical Society, 2005, 622: 1033-1043.

Harko T.C. and Cheng K.S., Time delay of photons of different energies in multidimensional cosmological models, The Astrophysical Journal. The American Astronomical Society, 2004, 611: 633-641.

Huang Y.F., Lu T. and Cheng K.S., Beaming effects in GRBs and orphan afterglows, Astrophysics and Space Science. Springer, 2005, 297: 53-61.

Huang Y.F., Lu T. and Cheng K.S., Beaming effects in GRBs and orphan afterglows, In: Cheng K.S., Romero G.E., Multiwavelength approach to unidentified gamma-ray sources. Springer, 2005, 53-61.

Romero G.E. and Cheng K.S., Fundamentals of gamma-ray astrophysics, In: Cheng K.S., Romero G.E., Cosmic Gamma-Ray Sources. Amsterdam, Kluwer Academic Pub., 2004, Chapter 2: 21-46.

Tam P.H., Pun J.C.S., Huang Y.F. and Cheng K.S., Early re-brightenings in GRB afterglows as signatures of low-to-high density boundary, New Astronomy. Amsterdam, Elsevier B.V., 2005, 10: 535-544.

Usov V.V., Harko T.C. and Cheng K.S., Structure of the electrospheres of bare strange stars, The Astrophysical Journal. The American Astronomical Society, 2005, 620: 915-921.

Wang W., Jiang Z. and Cheng K.S., Contribution to diffuse gamma-rays in the Galactic Centre region from unresolved millisecond pulsars, Monthly Notices of the Royal Astronomical Society. London, Royal Astronomical Society, 2005, 358: 263-269.

Wang W., Jiang Z., Pun J.C.S. and Cheng K.S., Possible TeV source candidates among the unidentified EGRET sources, Monthly Notices of the Royal Astronomical Society. London, Royal Astronomical Society, 2005, 360: 646-654.

Wang X., Cheng K.S. and Tam P.H., Optical afterglows from cylindrical jets of short gamma-ray bursts, The Astrophysical Journal. The American Astronomical Society, 2005, 621: 894-901.

Researcher : Cheung CH

List of Research Outputs

Cheung C.H., Djurisic A., Kwong C.Y., Tam H.L., Cheah K.W., Liu Z., Chan W.K., Chui P.C., Chan J. and Rakic A.D., Change of the emission spectra in organic light-emitting diodes by layer thickness modification, Applied Physics Letters. New York, American Institute of Physics, 2004, 85: 2944-2946.

Cheung C.H., Djurisic A., Kwong C.Y., Tam H.L., Cheah K.W., Liu Z., Chan W.K., Chui P.C., Chan J. and Rakic A.D., Reduced angular dependence of the emission from tris(8-hydroxyquinoline) aluminum based microcavity, Optics Communications. Amsterdam, Elsevier B.V., 2005, 248: 287-293.

Cheung C.H., Djurisic A., Leung Y.H., Wei Z., Xu S. and Chan W.K., Tris(8-hydroxyquinoline) aluminium nanowires: a simple synthesis method, Chemical Physics Letters. Amsterdam, Elsevier B.V., 2004, 394: 203-206.

Djurisic A., Kwong C.Y., Cheung C.H., Tam H.L., Cheah K.W., Liu Z., Chan W.K. and Chui P.C., Near-infrared emission from tris(8-hydroxyquinoline) aluminum based microcavity light emitting diodes, Chemical Physics Letters. Amsterdam, Elsevier B.V., 2004, 399: 446-450.

Leung Y.H., Djurisic A., Cheung C.H., Xie M.H. and Chan W.K., Growth of N, N'-di(naphthalene-1-yl)-N, N'-diphenyl-benzidine dome structures, Journal of Applied Physics. New York, American Institute of Physics, 2005, 97: 033515:1-5.

Liu Z., Kwong C.Y., Cheung C.H., Djurisic A., Chan Y. and Chui P.C., The characterization of the optical functions of BCP and CBP thin films by spectroscopic ellipsometry, Synthetic Metals. Amsterdam, Elsevier B.V., 2005, 150: 159-163.

Researcher : Cheung CH

List of Research Outputs

Researcher : Cheung CK

List of Research Outputs

Naik P.S., Cheung C.K., Beling C.D. and Fung S.H.Y., A real-time S-parameter imaging system, Acta Physica Polonica A. Poland, The Polish Physical Society, 2005, 107: 761-768.

Weng H., Ling F.C.C., Beling C.D., Fung S.H.Y., Cheung C.K., Kwan P.Y.R. and Hui I.P., Tungsten mesh as positron transmission moderator in a monoenergetic positron beam, Nuclear Instruments and Methods in Physics Research B. Amsterdam, Elsevier B.V., 2004, 225: 397-401.

Researcher : Chik TWD

List of Research Outputs

Chik T.W.D., Coombes S. and Wang Z.D., Clustering through postinhibitory rebound in synaptically coupled neurons, Physical Review E. New York, The American Physical Society, 2004, 70: 011908:1-9.

Chik T.W.D., Global coherent activities in inhibitory neural systems. Hong Kong, The University of Hong Kong, 2004, 1-63.

Researcher : Chow FK

List of Research Outputs

Ho K.H., Man W.C., Chow F.K. and Chau H.F., Memory is relevant in the symmetric phase of the minority game, Physical Review E. New York, The American Physical Society, 2005, 71: 066120: 1-5.

Ho K.H., Chow F.K. and Chau H.F., Wealth inequality in the minority game, Physical Review E. New York, The American Physical Society, 2004, 70: 066110:1-7.

Researcher : Chow FK

List of Research Outputs

Ho K.H., Man W.C., Chow F.K. and Chau H.F., Memory is relevant in the symmetric phase of the minority game, Physical Review E. New York, The American Physical Society, 2005, 71: 066120: 1-5.

Ho K.H., Chow F.K. and Chau H.F., Wealth inequality in the minority game, Physical Review E. New York, The American Physical Society, 2004, 70: 066110:1-7.

Researcher : Dai X

List of Research Outputs

Cao Y., Xu S., Lu W., Dai X., Chan Y.F., Wang N., Liu Y., Wu H.S., Xie M.H. and Tong S.Y., In situ revelation of a zinc-blende InN wetting layer during Stranski-Krastanov growth on GaN(0001) by molecular-beam epitaxy, Physical Review B. New York, The American Physical Society, 2005, 71: 155322:1-5.

Dai X., Haule K. and Kotliar G., "Strong-couplingsolver for the quantum impurity model", Physical Review B. 2005, 72,: 045111.

Huang Y., Chen X., Fung S.H.Y., Beling C.D., Ling F.C.C., Dai X. and Xie M.H., Current transport property of n-GaN/n-6H-SiC heterojunction: Influence of interface states, Applied Physics Letters. New York, American Institute of Physics, 2005, 86: 122102:1-3.

Researcher : Dai X

List of Research Outputs

Dai X., Haule K. and Kotliar G., "Strong-couplingsolver for the quantum impurity model", Physical Review B. 2005, 72,: 045111.

Researcher : Djurisic A

Project Title:	Microcavity organic light emitting diodes
Investigator(s):	Djurisic A, Chan WK, Lai PT
Department:	Electrical and Electronic Engineering
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	09/2002
Completion Date:	08/2004

Abstract:

The main objective of this project is the development of microcavity organic light-emitting diodes (OLEDs). Specifically, the project includes: 1) synthesis of novel organic materials suitable for microcavity OLED applications in either UV, or visible, or IR spectral region; 2) characterization of the optical properties of the materials to be used in fabrication of the microcavity OLEDs; 3) mirror design an fabrication, taking into account specific requirements for each spectral region considered; and 4) microcavity OLED design and fabrication for operation in one or more of the three spectral regions considered.

Project Title:	Phthalocyanine based organic optoelectronic devices: doping, interfaces, and novel device structures
Investigator(s):	Djurisic A, Chan WK
Department:	Electrical and Electronic Engineering
Source(s) of Funding:	Incentive Award for RGC CERG Fundable But Not Funded Projects
Start Date:	07/2003

Abstract:

To study the properties of phthalocyanine materials and their derivatives for applications in OLEDs and organic solar cells and, based on obtained results, to fabricate devices with superior performance.

Project Title:	ZnO micro- and nanostructures
Investigator(s):	Djurisic A
Department:	Physics
Source(s) of Funding:	Seed Funding for New Staff
Start Date:	08/2003
Completion Date:	07/2004

Abstract:

To investigate the structural and the optical properties of ZnO samples prepared under different conditions in order to elucidate growth mechanisms and to investigate the origin of the visible (typically green) emission in ZnO.

Project Title:	Organic/inorganic nanocomposites for photovoltaic cells and organic light emitting diodes
Investigator(s):	Djurisic A, Chan WK, Sahraoui B., Nunzi J.M.
Department:	Physics
Source(s) of Funding:	France/Hong Kong Joint Research Scheme - Travel Grants
Start Date:	01/2004

Abstract:

To study the optical and charge transport properties in the organic/inorganic nanocomposites; to fabricate and characterize photovoltaic cells with improved performance based on organic/inorganic nanocomposites; to fabricate composite layers with improved charge transport and apply them to organic light emitting diodes (OLEDs).

Project Title:	Structural, electrical, and optical properties of organic/inorganic nanocomposites for optoelectronic applications
Investigator(s):	Djurisic A, Chan WK
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	09/2004

Abstract:

To study : (1) the fabrication and/or surface modifications of inorganic nanostructures; (2) the fabrication of nanocomposite films containing one or more types of nanostructures; (3) the study of structural, electrical, and optical properties of nanocomposite films; (3) the application of nanocomposite films to organic light emitting diodes and organic solar cells.

Project Title:	Fabrication and Characterization of Organic Micro- and Nanostructures for Optoelectronic Device Applications
Investigator(s):	Djurisic A, Chan WK
Department:	Physics
Source(s) of Funding:	Seed Funding Programme for Basic Research
Start Date:	01/2005

Abstract:

Objectives:Fabrication and characterization of organic nanostructuresExploring the application of organic nanostructures in organic optoelectronic devicesWe propose to fabricate and characterize organic nanostructures for a variety of materials which are of interest for applications in organic optoelectronic devices. Both materails of interest for organic light emitting diodes and organic solar cells will be considered. These nanostructures are of interest both from practical applications and fundamental science points of view. Since the majority of the work on nanomaterials is focused on inorganic nanostructures, growth mechanisms and relationship between the fabrication conditions, structure, and properties of organic nanostructures are generally unknown. On the other hand, it is expected that the use of nanostructured materials instead of conventional thin films will improve the performance of organic optoelectonic devices. Therefore, we propose to study the organic nanostructures fabricated under different conditions, optimize the fabrication conditions to yield morphologies of interest for optoelectronic devices, and investigate the application of most promising structures in organic light emitting diodes and organic solar cells.

Project Title:	Structural, electrical, and optical properties of organic/inorganic nanocomposites for optoelectronic applications
Investigator(s):	Djurisic A
Department:	Physics
Source(s) of Funding:	Merit Award for RGC CERG Funded Projects
Start Date:	01/2005

Abstract:

Refer to hard copy

List of Research Outputs

Cai X., Djurisic A., Xie M.H., Liu H., Zhang X.X., Zhu J.J. and Yang H., Ferromagnetism in Mn and Cr doped GaN by thermal diffusion, Materials Science and Engineering B. Amsterdam, Elsevier B.V., 2005, 117: 292-295.

Cai X., Djurisic A., Xie M.H., Liu H., Zhang X.X., Zhu J.J., Yang H. and Leung Y.H., Magnetic doping and characterization of n-type GaN, AIP Conference Proceedings. New York, American Institute of Physics, 2005, 772: 319-320.

Cai X., Cheng K.W., Oey C.C., Djurisic A., Chan W.K., Xie M.H. and Chui P.C., Porous metallic films fabricated by self-assembly of gold nanoparticles, Thin Solid Films. Amsterdam, Elsevier B.V., 2005, 491: 66-70.

Chan W.K., Man K.K.Y., Cheng K.W., Wong H.L. and Djurisic A., Fabrication of organic photovoltaic devices by the layer-by-layer polyelectrolyte deposition method, 2004 Conference on Optoelectronic and Microelectronic Materials and Devices (COMMAD 2004), The University of Queensland, Brisbane, Australia, December 8-10, 2004.

Chan W.K., Man K.K.Y., Wong H.L., Cheng K.W., Tse C.W. and Djurisic A., The use of metal-containing polymers as sensitizers in photovoltaic cells and photodetectors, The 5th Asian Photochemistry Conference (APC-5), Taipei, Taiwan, January 5-10. 2005.

Cheng K.W., Man K.K.Y., Tse C.W., Chan W.K. and Djurisic A., Fabrication of photovoltaic devices incorporated with cadmium sulfide nanoparticles by a multilayer deposition process, Materials Research Society 2004 Fall Meeting, Boston, USA, November 28-December 2, 2004.

Cheung C.H., Djurisic A., Kwong C.Y., Tam H.L., Cheah K.W., Liu Z., Chan W.K., Chui P.C., Chan J. and Rakic A.D., Change of the emission spectra in organic light-emitting diodes by layer thickness modification, Applied Physics Letters. New York, American Institute of Physics, 2004, 85: 2944-2946.

Cheung C.H., Djurisic A., Kwong C.Y., Tam H.L., Cheah K.W., Liu Z., Chan W.K., Chui P.C., Chan J. and Rakic A.D., Reduced angular dependence of the emission from tris(8-hydroxyquinoline) aluminum based microcavity, Optics Communications. Amsterdam, Elsevier B.V., 2005, 248: 287-293.

Cheung C.H., Djurisic A., Leung Y.H., Wei Z., Xu S. and Chan W.K., Tris(8-hydroxyquinoline) aluminium nanowires: a simple synthesis method, Chemical Physics Letters. Amsterdam, Elsevier B.V., 2004, 394: 203-206.

Chu X.F., Jiang D.L., Djurisic A. and Leung Y.H., Gas-sensing properties of thick film based on ZnO nano-tetrapods, Chemical Physics Letters. Amsterdam, Elsevier B.V., 2005, 401: 426-429.

Djurisic A., Leung Y.H., Liu Z., Li D., Xie M.H., Choy W.C.H. and Cheah K.W., Green photoluminescence in ZnO nanostructures, AIP Conference Proceedings. New York, American Institute of Physics, 2005, 772: 889-890.

Djurisic A., Kwong C.Y., Cheung C.H., Tam H.L., Cheah K.W., Liu Z., Chan W.K. and Chui P.C., Near-infrared emission from tris(8-hydroxyquinoline) aluminum based microcavity light emitting diodes, Chemical Physics Letters. Amsterdam, Elsevier B.V., 2004, 399: 446-450.

Djurisic A., Choy W.C.H., Roy V. .A. .L., Leung Y.H., Kwong C.Y., Cheah K. .W., Gundu Rao T. .K., Chan W.K., Lui H. .F. and Surya C., Photoluminescence and EPR of ZnO tetrapod nano-structures, Advanced Funct. Mater.. 2004, 14: 856-864.

Djurisic A., Choy W.C.H., Roy V.A.L., Leung Y.H., Kwong C.Y., Cheah K.W., Rao T.K.G., Chan W.K., Lui H.F. and Surya C., Photoluminescence and electron paramagnetic resonance of ZnO tetrapod structures, Advanced Functional Materials. Weinheim, WILEY-VCH Verlag GmbH & Co., 2004, 14: 856-864.

Djurisic A. and Kwong C.Y., The influence of the electrode choice on the performance of organic solar cells, In: Sun S.S., Sariciftci N.S., Organic Photovoltaics: Mechanisms, Materials, and Devices. Taylor & Francis, 2005, Chapter 20: 453-477.

Kwong C.Y., Djurisic A., Choy W.C.H., Li D., Xie M.H., Chan W.K., Cheah K.W., Lai P.T. and Chui P.C., Efficiency and stability of different tris(8-hydroxyquinoline) aluminium (Alq₃) derivatives in OLED applications, Materials Science and Engineering B. Amsterdam, Elsevier B.V., 2005, 116: 75-81.

Kwong C.Y., Djurisic A., Chui P.C. and Chan W.K., Nanocomposite solar cells - influence of particle concentration, size and shape on the device performance, Proceedings of SPIE. Bellingham, SPIE, 2004, 5520: 176-183.

Kwong C.Y., Choy W.C.H., Djurisic A., Chui P.C., Cheng K.W. and Chan W.K., Poly(3-hexylthiophene): TiO₂ nanocomposites for solar cell applications, Nanotechnology. Bristol, IOP Publishing Limited, 2004, 15: 1156-1161.

Leung Y.H., Djurisic A., Cheung C.H., Xie M.H. and Chan W.K., Growth of N, N'-di(naphthalene-1-yl)-N, N'-diphenyl-benzidine dome structures, Journal of Applied Physics. New York, American Institute of Physics, 2005, 97: 033515:1-5.

Leung Y.H., Djurisic A., Choy W.C.H., Xie M.H., Gao J., Cheah K.W., Man K.K.Y. and Chan W.K., Synthesis and properties of ZnO multipod structures, Journal of Crystal Growth. Amsterdam, Elsevier B.V., 2005, 274: 430-437.

Leung Y.H., Djurisic A. and Xie M.H., Synthesis and properties of ZnO nano-ribbon and comb structures, AIP Conference Proceedings. New York, American Institute of Physics, 2005, 772: 879-880.

Leung Y.H., Kwok W.M., Djurisic A., Phillips D.L. and Chan W.K., Time-resolved study of stimulated emission in ZnO tetrapod nanowires, Nanotechnology. Bristol, IOP Publishing Limited, 2005, 16: 579-582.

Leung Y.H., Djurisic A., Gao J., Xie M.H., Wei Z., Xu S. and Chan W.K., Zinc oxide ribbon and comb structures: synthesis and optical properties, Chemical Physics Letters. Amsterdam, Elsevier B.V., 2004, 394: 452-457.

Leung Y.H., Djurisic A., Xie M.H., Kwong C.Y. and Chan W.K., ZnO nanostructures prepared from ZnO:CNT mixtures, Proceedings of SPIE. Bellingham, SPIE, 2004, 5510: 1-8.

Li C., Kwong C.Y., Djurisic A., Lai P.T., Chui P.C., Chan W.K. and Liu S.Y., Improved performance of OLEDs with ITO surface treatments, Thin Solid Films. Amsterdam, Elsevier B.V., 2005, 477: 57-62.

Li C., Djurisic A., Kwong C.Y., Lai P.T., Chan W.K. and Liu S.Y., Indium tin oxide surface treatments for improvement of organic light-emittingdiode performance, Applied Physics A: Materials Science & Processing. Berlin, Springer-Verlag, 2005, 80: 301-307.

Li D., Leung Y.H., Djurisic A., Liu Z., Xie M.H., Shi S., Xu S. and Chan W.K., Different origins of visible luminescence in ZnO nanostructures fabricated by the chemical and evaporation methods, Applied Physics Letters. New York, American Institute of Physics, 2004, 85: 1601-1603.

Liu Z., Kwong C.Y., Cheung C.H., Djurisic A., Chan Y. and Chui P.C., The characterization of the optical functions of BCP and CBP thin films by spectroscopic ellipsometry, Synthetic Metals. Amsterdam, Elsevier B.V., 2005, 150: 159-163.

To C.N., Wang H., Djurisic A., Xie M.H., Chan W.K., Xie Z., Wu C. and Tong S.Y., Solvent dependence of the evolution of the surface morphology of thin asymmetric diblock copolymer films, Thin Solid Films. Amsterdam, Elsevier B.V., 2004, 467: 59-65.

Tse C.W., Cheng K.W., Chan W.K. and Djurisic A., Self-assembled monolayer formed by a rhenium complex containing hyperbranched polymer, Macromolecular Rapid Communications. WILEY-VCH Verlag GmbH & Co., 2004, 25: 1335-1339.

Wang R., Beling C.D., Fung S.H.Y., Djurisic A., Ling F.C.C., Kwong C.Y. and Li S., Influence of annealing temperature and environment on the properties of indium tin oxide thin films, Journal of Physics D: Applied Physics. Bristol, IOP Publishing Limited, 2005, 38: 2000-2005.

Wang R., Beling C.D., Fung S.H.Y., Djurisic A., Ling F.C.C. and Li S., Influence of gaseous annealing environment on the properties of indium-tin-oxide thin films, Journal of Applied Physics. New York, American Institute of Physics, 2005, 97: 033504:1-5.

Wong H.L., Cheng K.W., Man K.Y.K., Kwong C.Y., Chan W.K. and Djurisic A., Fabrication of bulk heterojunction photovoltaic devices using sublimable rhenium diimine complexes as photosensitizers, Proceedings of SPIE. Bellingham, SPIE, 2004, 5520: 168-175.

Zheng R.K., Liu H., Zhang X.X., Vellaisamy A.L.R. and Djurisic A., Exchange bias and the origin of magnetism in Mn-doped ZnO tetrapods, Applied Physics Letters. New York, American Institute of Physics, 2004, 85: 2589-2591.

Researcher : Ertan U

List of Research Outputs

Ertan U. and Cheng K.S., On the radio emission following the August 27 giant flare of SGR 1900+14, New Astronomy. Amsterdam, Elsevier B.V., 2004, 9: 503-507.

Researcher : Fung PCW

Project Title:	Development of a novel natural antioxidant with strong anti-aging and protective properties for skin
Investigator(s):	Fung PCW, Shen J
Department:	Medicine
Source(s) of Funding:	Seed Funding Programme for Applied Research
Start Date:	07/2002

Abstract:

To develop a novel antioxidants from herbal products which can scavenge superoxide, hydroxyl and lipid peroxide free radicals in skin.

Project Title:	Roles of plasma membrane cholesterol homeostasis in regulating neuronal oxidative damage of ischemic stroke
Investigator(s):	Fung PCW, Shen J
Department:	Medicine
Source(s) of Funding:	Small Project Funding
Start Date:	11/2003

Abstract:

To understand the roles of plasma membrane cholesterol homeostasis in protecting neuronal cells from oxidative damage during ischemic stroke.

List of Research Outputs

Researcher : Fung S

Project Title:	Study of particle irradiation induced defects in silicon carbide
Investigator(s):	Fung SHY, Gong M.
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	12/2002
Completion Date:	12/2004

Abstract:

The project is concerned with the study of defects in silicon carbide (SiC), a modern wide bandgap semiconductor. For some semiconductors, the bombardment (irradiation) of the material by energetic particles such as electrons, neutrons adn protons can generate both desirable and undesirable defects. The project is a systematic study of all the defects (and their interaction with impurities present) resulting from electron, neutron and proton irradiation.

Project Title:	Study of Particle Irradiation Induced Defects in Gallium Nitride
Investigator(s):	Fung SHY
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	09/2004

Abstract:

To systematically study the particle irradiation induced defects in GaN. Irradiation with electrons, neutrons, and protons is known to damage semiconductor materials by causing atomic displacement and/or ionization. The type and size of defects created depend on the energy, mass, charge, and fluency of the irradiating particles. Thus various defects such as mono-vacancy, divacancy, interstitial and antisite with different generation rates in samples irradiated with different particles may be studied; to compare the properties of defects created by the three different irradiation particles mentioned above.

Project Title:	Study of Particle Irradiation Induced Defects in Gallium Nitride
Investigator(s):	Fung SHY
Department:	Physics
Source(s) of Funding:	Merit Award for RGC CERG Funded Projects
Start Date:	01/2005

Abstract:

Refer to hard copy

Researcher : Fung SHY

Project Title:	Study of particle irradiation induced defects in silicon carbide
Investigator(s):	Fung SHY, Gong M.
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	12/2002
Completion Date:	12/2004

Abstract:

Project Title:	Study of Particle Irradiation Induced Defects in Gallium Nitride
Investigator(s):	Fung SHY
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	09/2004

Abstract:

Project Title:	Study of Particle Irradiation Induced Defects in Gallium Nitride
Investigator(s):	Fung SHY
Department:	Physics
Source(s) of Funding:	Merit Award for RGC CERG Funded Projects
Start Date:	01/2005

Abstract:

Refer to hard copy

List of Research Outputs

Chen T.P., Liu Y., Sun C.Q., Tse M.S., Hsieh J.H., Fu Y.Q., Liu Y.C. and Fung S.H.Y., Core-level shift of Si nanocrystals embedded in a SiO₂ matrix, Journal of Physical Chemistry B. American Chemical Society, 2004, 108: 16609-16612.

Chen X., Ling F.C.C., Gong M., Fung S.H.Y., Beling C.D., Brauer G., Anwand W. and Skorupa W., Anomalous behaviors of E₁/E₂ deep level defects in 6H silicon carbide, Applied Physics Letters. New York, American Institute of Physics, 2005, 86: 031903:1-3.

Chen X., Ling F.C.C., Fung S.H.Y. and Beling C.D., Electrically active deep level defects in 6H silicon carbide, Tenth National Seminar on Crystal Growth, Indian Association for Crystal Growth. Tamilnadu, Kongu Engineering College, 2005, 4.

Huang J.Y., Chen T.P., Ang C.H., Manju S. and Fung S.H.Y., A quantitative study of the relationship between the oxide charge trapping over the drain extension and the off-state drain leakage current, Applied Physics Letters. New York, American Institute of Physics, 2004, 85: 4211-4213.

Huang Y., Chen X., Fung S.H.Y., Beling C.D., Ling F.C.C., Dai X. and Xie M.H., Current transport property of n-GaN/n-6H-SiC heterojunction: Influence of interface states, Applied Physics Letters. New York, American Institute of Physics, 2005, 86: 122102:1-3.

Huang Y., Chen X., Fung S.H.Y., Beling C.D. and Ling F.C.C., Spatial characterization of a 2 in GaN wafer by Raman spectroscopy and capacitance-voltage measurements, Journal of Physics D: Applied Physics. Bristol, IOP Publishing Limited, 2004, 37: 2814-2818.

Huang Y., Chen X., Fung S.H.Y., Beling C.D., Ling F.C.C., Wei Z., Xu S. and Zhi C., The depth-profiled carrier concentration and scattering mechanism in undoped GaN film grown on sapphire, Journal of Applied Physics. New York, American Institute of Physics, 2004, 96: 1120-1126.

Lam C.H., Lam T.W., Ling F.C.C., Fung S.H.Y., Beling C.D., Hang D.S. and Weng H.M., Positron lifetime studies on 8 MeV electron-irradiated n-type 6H silicon carbide, Journal of Physics: Condensed Matter. Bristol, IOP Publishing Limited, 2004, 16: 8409-8419.

Ling F.C.C., Chen X., Fung S.H.Y., Beling C.D., Brauer G., Anwand W., Skorupa W. and Gong M., Deep level defects E₁/E₂ in n-type 6H silicon carbide induced by electron radiation and He-implantation, Physics of Semiconductors: 27th International Conference on the Physics of Semiconductors, Flagstaff, Arizona, 26-30 July 2004. New York, American Institute of Physics, 2005, 99-100.

Ling F.C.C., Chen X., Fung S.H.Y., Beling C.D., Gong M., Ge W.K., Wang J.N., Brauer G., Anwand W. and Skorupa W., Deep level defects in 6H silicon carbide, 六方碳化硅中的深能级缺陷, Physics. 物理, Beijing, Chinese Physical Society, 2004, 33: 786-790.

Ling F.C.C., Lui M.K.P., Ma S.K.M., Chen X., Fung S.H.Y. and Beling C.D., Nature of the acceptor responsible for p-type conduction in liquid encapsulatedCzochralski-grown undoped gallium antimonide, Applied Physics Letters. New York, American Institute of Physics, 2004, 85: 384-386.

Liu Y., Chen T.P., Ng C.Y., Tse M.S., Zhao P., Fu Y.Q., Zhang S. and Fung S.H.Y., Random capacitance modulation due to charging/discharging in Si nanocrystals embedded in gate dielectric, Nanotechnology. Bristol, IOP Publishing Limited, 2005, 16: 1119-1122.

Ma S.K.M., Lui M.K.P., Ling F.C.C., Fung S.H.Y., Beling C.D., Li K.F., Cheah K.W., Gong M., Hang H.S. and Weng H.M., Electron irradiated liquid encapsulated Czochralski grown undoped gallium antimonide studied by positron lifetime spectroscopy and photoluminescence, Journal of Physics: Condensed Matter. Bristol, IOP Publishing Limited, 2004, 16: 6205-6212.

Naik P.S., Cheung C.K., Beling C.D. and Fung S.H.Y., A real-time S-parameter imaging system, Acta Physica Polonica A. Poland, The Polish Physical Society, 2005, 107: 761-768.

Ng C.Y., Chen T.P., Liu Y., Sun C.Q. and Fung S.H.Y., Influence of nitrogen on tunneling barrier heights and effective masses of electrons and holes at lightly-nitrided SiO₂/Si interface, Journal of Applied Physics. New York, American Institute of Physics, 2004, 96: 5912-5914.

Ng C.Y., Chen T.P., Tse M.S., Lim V.S.W., Fung S.H.Y. and Tseng A.A., Influence of silicon-nanocrystal distribution in SiO₂ matrix on charge injection and charge decay, Applied Physics Letters. New York, American Institute of Physics, 2005, 86: 152110:1-3.

Wang K., Wang R., Fung S.H.Y., Beling C.D., Chen X., Huang Y., Li S., Xu S.J. and Gong M., Film thickness degradation of Au/GaN Schottky contact characteristics, Materials Science and Engineering B. Amsterdam, Elsevier B.V., 2005, 117: 21-25.

Wang R., Beling C.D., Fung S.H.Y., Djurisic A., Ling F.C.C., Kwong C.Y. and Li S., Influence of annealing temperature and environment on the properties of indium tin oxide thin films, Journal of Physics D: Applied Physics. Bristol, IOP Publishing Limited, 2005, 38: 2000-2005.

Wang R., Beling C.D., Fung S.H.Y., Djurisic A., Ling F.C.C. and Li S., Influence of gaseous annealing environment on the properties of indium-tin-oxide thin films, Journal of Applied Physics. New York, American Institute of Physics, 2005, 97: 033504:1-5.

Weng H., Ling F.C.C., Beling C.D., Fung S.H.Y., Cheung C.K., Kwan P.Y.R. and Hui I.P., Tungsten mesh as positron transmission moderator in a monoenergetic positron beam, Nuclear Instruments and Methods in Physics Research B. Amsterdam, Elsevier B.V., 2004, 225: 397-401.

Researcher : Gao J

Project Title:	Epitaxial ramp structures with a continuously graded Y_xPr₁-_xBa₂Cu₃O_y for Josephson junctions
Investigator(s):	Gao J
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	10/2001
Completion Date:	09/2004

Abstract:

To develop a novel epitaxial ramp structure using a continually graded Y_xP₁-_xBCOO.

Project Title:	Preparation of epitaxial YBa₂Cu₃O_y thin films on silicon with a double buffer of Eu₂CuO₄/YSZ
Investigator(s):	Gao J
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	10/2002

Abstract:

The project proposes to reveal the feasibility of applying a double buffer EuCuO(ECO)/YSZ to improve the growth of YBCO on Si. The synthesis process, resultant structural properties and their relation to superconductivity of YBCO films will be investigated. In addition, their crystalline and superconductivity, as well as the interfaces will be systematically studied.

Project Title:	Field and current effect in heteroepitaxial multiplayer structures of perovskite oxides
Investigator(s):	Gao J
Department:	Physics
Source(s) of Funding:	Incentive Award for RGC CERG Fundable But Not Funded Projects
Start Date:	07/2003

Abstract:

To develop heteroepitaxial structures based on perovskite transition metal oxides and to investigate the effect of electric field (or current) in such heterostructures, which has triggered intense scientific activity recently.

Project Title:	Current induced deduction on the peak resistance of perovskite transition metal oxides
Investigator(s):	Gao J
Department:	Physics
Source(s) of Funding:	Small Project Funding
Start Date:	11/2003

Abstract:

To study the influence of a transport current in the peak resistance of perovskite transition metal oxides.

Project Title:	Opto-electric response and light excitation in heteroepitaxial thin films of R1-xAxMnO3 perovskite oxides
Investigator(s):	Gao J
Department:	Physics
Source(s) of Funding:	Seed Funding Programme for Basic Research
Start Date:	01/2005

Abstract:

The electronic states in perovskite oxides R1-xAxMnO3, which are not completely understood currently, play the dominant role in determining the material properties. The motivation of the research lies in the opto-electronic response in heteroepitaxial thin films of these compounds. The main objective is to reveal the nature of giant electroresistance (ER) and to get a better understanding of the mechanism that account for the peculiar nonlinear electronic transport. Our efforts will be focused at the electron-phonon interaction and the effects induced by optical excitation in these materials, as well as the modulation process of a light/field on the coexistence of multiphases in different systems. In particular, the following pertinent scientific and technical issues will be addressed:• Growth and structural characterization of heteroepitaxial films of various perovskite manganites.• Electronic states and optical characterization in these heteroepitaxial structures.• The opto-electronic responses and giant ER effects under an optical or field excitation.Effort will be also made to explore the feasibility for device applications, though it is not the main objective.This part of study explore how the applied field affects the properties of these material in hoping to shed light on the physical mechanisms, which are difficult to understand using conventional research scheme. Interaction between a material and external excitation is always a hot subject in physics society. Our recent study has shown that a current with a high density can induce a giant ER in the ABO3 thin films. With the incorporation of optical excitation into the experiment, free carriers can be excited in the materials and, likely, the MI transition will be influenced. Our research will aim at the dynamical process of the way that electrons are excited and how the photon-generated electrons interact with Mn ions. Since the magnetic properties of R1-xAxMnO3 is closely related to holes, optical excitation can serve as a unique laboratory in which many of the material properties can be studied.

Project Title:	Normal and abnormal giant electroresistance induced by currents in epitaxial thin films of mixed-valent manganite oxides
Investigator(s):	Gao J
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	01/2005

Abstract:

To systematically investigate the current induced giant ER effect in wide range of epitaxial thin films of mixed-valent manganite oxides; to study the nature of the novel metastable state introduced subsequently by applying a large current, i.e. the abnormal ER effect; try to understand the physical mechanism behind these experimental observations.

Project Title:	Normal and abnormal giant electroresistance induced by currents in epitaxial thin films of mixed-valent manganite oxides
Investigator(s):	Gao J
Department:	Physics
Source(s) of Funding:	Merit Award for RGC CERG Funded Projects
Start Date:	01/2005

Abstract:

Refer to hard copy

List of Research Outputs

Cai H.L., Wu X.S., Wang F.Z., Hu A., Jiang S.S., Gao J. and Tan W.S., A-site disorder induces magnetoresistance in Y and Sr co-doped La_2/3-xY_xCa_1/3-ySr_yMnO₃, Journal of Alloys and Compounds. Amsterdam, Elsevier B.V., 2005, 397: 250-254.

Gao J. and Hu F., Current-induced metastable resistive state in epitaxial thin films of La_1-xCa_xMnO₃ (x=0.2, 0.3), Applied Physics Letters. New York, American Institute of Physics, 2005, 86: 092504:1-3.

Gao J. and Hu F., Current-sensitive electroresistance and the response to a magnetic field in La_0.8Ca_0.2MnO₃ epitaxial thin films, Journal of Applied Physics. New York, American Institute of Physics, 2005, 97: 10H706:1-3.

Gao J. and Sun J., Josephson junctions with a continually graded barrier, United States Patent. 2004, US 6,818,918 B2.

Gao J. and Sun J., The effective barrier thickness in ramp-type junctions with a continually graded barrier of Y_1-xPr_xBa₂Cu₃O_y, International Journal of Modern Physics B. Singapore, World Scientific, 2005, 19: 383-385.

Hao J.H. and Gao J., Abnormal reduction of Eu ions and luminescence in CaB₂O₄: Eu thin films, Applied Physics Letters. New York, American Institute of Physics, 2004, 85: 3720-3722.

Hao J.H. and Gao J., Crystalline SrTiO₃ thin films on silicon by pulsed laser deposition, International Journal of Modern Physics B. Singapore, World Scientific, 2005, 19: 533-535.

Hu F., Gao J., Qian X.L., llyn M., Tishin A.M., Sun J.R. and Shen B.G., Magnetocaloric effect in itinerant electron metamagnetic systems La(Fe_1-xCo_x)_11.9Si_1.1, Journal of Applied Physics. New York, American Institute of Physics, 2005, 97: 10M303:1-3.

Hu F., Gao J., Qian X.L., Li Y.X., Du J., Sun J.R. and Shen B.G., Magnetoresistance in LaFe_11.2Co_0.7Si_1.1 compound, IEEE Transactions on Magnetics. IEEE, 2004, 40: 2754-2756.

Hu L., Gao J. and Shen S.Q., Effects of spin imbalance on the electric-field-driven quantum dissipationless spin current in p-doped semiconductors, Physical Review B. New York, The American Physical Society, 2004, 70: 235323:1-8.

Ilyn M., Tishin A.M., Hu F.X., Gao J., Sun J.R. and Shen B.G., Magnetocaloric properties of the LaFe_11.7Si_1.3 and LaFe_11.2Co_0.7Si_1.1 systems, Journal of Magnetism and Magnetic Materials. Amsterdam, Elsevier B.V., 2005, 290-291: 712-714.

Leung Y.H., Djurisic A., Choy W.C.H., Xie M.H., Gao J., Cheah K.W., Man K.K.Y. and Chan W.K., Synthesis and properties of ZnO multipod structures, Journal of Crystal Growth. Amsterdam, Elsevier B.V., 2005, 274: 430-437.

Leung Y.H., Djurisic A., Gao J., Xie M.H., Wei Z., Xu S. and Chan W.K., Zinc oxide ribbon and comb structures: synthesis and optical properties, Chemical Physics Letters. Amsterdam, Elsevier B.V., 2004, 394: 452-457.

Li X.L., Gao J., Wong H.Y.E. and Mai Z.H., Effect of Eu₂CuO₄/Yttrium-stabilized Z_rO₂ buffer layers on YB₂Cu₃O_7-x thin films grown on Si substrates, Thin Solid Films. Amsterdam, Elsevier B.V., 2005, 489: 200-204.

Li X.L., Li M., Mai Z.H., Gao J. and Xu H., Microstructural studies of YB₂Cu₃O_7-d/Nd₂CuO₄/YB₂Cu₃O_7-d Josephson junctions with a Nd₂CuO₄ buffer layer grown on YSZ substrate, Physica C. Amsterdam, Elsevier B.V., 2004, 416: 69-74.

Nie Y., Wang Z.H., Qiu L., Ding S.Y. and Gao J., Dissipation of the Bi_2.4-xPb_xSr₂CaCu₂O_8+y intrinsic array Josephson junctions, International Journal of Modern Physics B. Singapore, World Scientific, 2005, 19: 479-481.

Nie Y., Wang Z.H., Qiu L. and Gao J., Nonequilibrium characteristics of intrinsic Bi_2.3Pb_0.1Sr₂CaCu₂O_8+y Josephson junctions, International Journal of Modern Physics B. Singapore, World Scientific, 2005, 19: 235-237.

Wang Z.H., Nie Y., Ding S.Y. and Gao J., Characteristics of single intrinsic Josephson junction, International Journal of Modern Physics B. Singapore, World Scientific, 2005, 19: 483-485.

Wu X.S. and Gao J., Heat of formation in (Mg, X)B₂ (X = Li, Na, Ca, Al), Physica C. Amsterdam, Elsevier B.V., 2005, 418: 151-159.

Wu X.S., Qian B., Zhang Y.M., You B., Liu J.S., Jiang S.S., Gao J., Wu Z.H., Zheng W.L., Jia Q.J. and Jiang X.M., Magnetoresistance effects on La_0.67Ca_0.33MnO₃/YBa₂Cu₃O_y/Ni trilayers, Physica C. Amsterdam, Elsevier B.V., 2005, 423: 57-62.

Wu X.S., Jiang S.S., Cui M.Q., Zhu P.P. and Gao J., Soft X-ray reflectivity for YBa₂Cu₃O_7-δ and La_2/3Ca_1/3MnO₃ films, Journal of Electron Spectroscopy and Related Phenomena. Amsterdam, Elsevier B.V., 2005, 144-147: 471-474.

Xu S., Wu X.S., Liu G., Liu J.S., Du J., Jiang S.S. and Gao J., Structure and spin gap in YBa₂Cu_3-xGd_xO_7-δ superconductors, Physica C. Amsterdam, Elsevier B.V., 2004, 417: 63-68.

Researcher : Han Q

List of Research Outputs

Chen H.W., Han Q. and Wang Z.D., Phase diagram of unconventional superconductors on triangular lattices, International Journal of Modern Physics B. Singapore, World Scientific, 2005, 19: 119-121.

Han Q. and Wang Z.D., Nuclear spin relaxation rate of disordered p_x+ip_y-wave superconductors, Physical Review B. New York, The American Physical Society, 2004, 70: 184504:1-4.

Xia T., Han Q., Chen Y., Wang Z.D. and Li X.G., Impurity states in superconducting systems with stripe like modulation, International Journal of Modern Physics B. Singapore, World Scientific, 2005, 19: 267-269.

Researcher : Hao J

Project Title:	Heteroepitaxial structures of strontium titanate thin films on silicon by laser molecular beam epitaxy
Investigator(s):	Hao JH, Gao J
Department:	Physics
Source(s) of Funding:	Seed Funding Programme for Basic Research
Start Date:	02/2004
Completion Date:	01/2005

Abstract:

Heteroepitaxy of high-quality SrTiO₃ (STO) thin films on Si substrates by laser molecular beam epitaxy (MBE); to investigate the structural, interfacial, electrical and dielectric properties in the heterointegration of epitaxial STO on Si.

Project Title:	Dielectric properties in novel perovskite oxide thin films
Investigator(s):	Hao JH
Department:	Physics
Source(s) of Funding:	Seed Funding Programme for Basic Research
Start Date:	12/2004

Abstract:

Objective of the research proposal:Design and synthesis of novel functional oxides with unusual and promising dielectric properties. Investigation of processing effects on the structural and dielectric properties of thin films. Searching and understanding of some possible new phenomena in novel perovskite oxide thin films.The key issue is to investigate how the preparation parameters of perovskite oxide thin film affect their dielectric properties. The key problem is interfacial effects between novel perovskite oxides and various substrates. In the proposed investigation, the growth of epitaxial thin film with full control will be carried out. Various structural, dielectric and optical characterizations will be employed.

Project Title:	Laser molecular beam epitaxy growth and characterization of SrTiO3 thin films for tunable YBa2Cu3Oy applications
Investigator(s):	Hao JH, Gao J
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	12/2004

Abstract:

To investigate SrTiO₃ thin films that exhibit enhanced dielectric properties suitable for tunable YBa₂Cu₃O_y (YBCO) applications with the specific aims of: (1) well-controlled epitaxial growth of STO thin films by laser molecular beam epitaxy (MBE); (2) establishment of the correlations between the deposition parameters of STO thin films, their structural characteristics, and dielectric properties. Realization of the fundamental mechanisms of dielectric properties in STO thin films; (3) evaluation of the feasibility of laser MBE grown YBCO/STO multilayers for tunable applications.

Project Title:	Laser molecular beam epitaxy growth and characterization of SrTiO3 thin films for tunable YBa2Cu3Oy applications
Investigator(s):	Hao JH
Department:	Physics
Source(s) of Funding:	Merit Award for RGC CERG Funded Projects
Start Date:	01/2005

Abstract:

Refer to hard copy

List of Research Outputs

Hao J., Lou Z.D., Renaud I. and Cocivera M., Electroluminescence of europium-doped gallium oxide thin films, Thin Solid Films. Amsterdam, Elsevier B.V., 2004, 467: 182-185.

Researcher : Hao JH

Project Title:	Heteroepitaxial structures of strontium titanate thin films on silicon by laser molecular beam epitaxy
Investigator(s):	Hao JH, Gao J
Department:	Physics
Source(s) of Funding:	Seed Funding Programme for Basic Research
Start Date:	02/2004
Completion Date:	01/2005

Abstract:

Project Title:	Dielectric properties in novel perovskite oxide thin films
Investigator(s):	Hao JH
Department:	Physics
Source(s) of Funding:	Seed Funding Programme for Basic Research
Start Date:	12/2004

Abstract:

Project Title:	Laser molecular beam epitaxy growth and characterization of SrTiO3 thin films for tunable YBa2Cu3Oy applications
Investigator(s):	Hao JH, Gao J
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	12/2004

Abstract:

Project Title:	Laser molecular beam epitaxy growth and characterization of SrTiO3 thin films for tunable YBa2Cu3Oy applications
Investigator(s):	Hao JH
Department:	Physics
Source(s) of Funding:	Merit Award for RGC CERG Funded Projects
Start Date:	01/2005

Abstract:

Refer to hard copy

List of Research Outputs

Hao J.H. and Gao J., Abnormal reduction of Eu ions and luminescence in CaB₂O₄: Eu thin films, Applied Physics Letters. New York, American Institute of Physics, 2004, 85: 3720-3722.

Hao J.H. and Gao J., Crystalline SrTiO₃ thin films on silicon by pulsed laser deposition, International Journal of Modern Physics B. Singapore, World Scientific, 2005, 19: 533-535.

Lou Z. and Hao J.H., Cathodoluminescent characteristics of green-emitting ZnAl₂O₄:Mn thin-film phosphors, Applied Physics A: Materials Science & Processing. Berlin, Springer-Verlag, 2005, 80: 151-154.

Researcher : Harko TC

Project Title:	Observational tests of the brane world cosmological models
Investigator(s):	Harko TC
Department:	Physics
Source(s) of Funding:	Seed Funding Programme for Basic Research
Start Date:	01/2005

Abstract:

The idea that our four-dimensional Universe might be a higher dimensional space-time, had been proposed and studied, from both mathematical and physical points of view, for a long time. Recently, due to the proposal by Randall and Sundrum [1-2] that our four-dimensional space-time is a three-brane, embedded in a five-dimensional space-time (the bulk), the idea of the embedding of our Universe in a higher dimensional space had attracted again a considerable interest. According to the brane-world scenario, the physical fields (electromagnetic, Yang-Mills etc.) in our four-dimensional Universe are confined to the three brane. These fields are assumed to arise as fluctuations of branes in string theories. Only gravity can freely propagate in both the brane and bulk space-times, with the gravitational self-couplings not significantly modified. Due to the correction terms coming from the extra dimensions, significant deviations from the Einstein theory occur in brane world models at very high energies [3-4]. Gravity is largely modified at the electro-weak scale of 1 TeV. The cosmological implications of the brane world theories have been extensively investigated in the physical literature [5-7]. In the present project our main objective is to study the modifications due to extra-dimensional or non-Riemannian effects on some particular astrophysical processes and to propose some observational tests which could provide evidence for the existence of extra-dimensions or non-Riemannian geometries and to discriminate between different models. Some specific objectives for this project are as follows:(1) The study of the vacuum static solutions of the gravitational field equations with the extra-dimensional effects included. The modification of the classical Schwarzschild geometry of general relativity, due to the extra-dimensional (bulk) effects leads to the possibility of testing the model at the solar system or at a galactic scale. This can be done by using either the classical tests of general relativity (perihelion precession, light deflection, gravitational redshift) for the solar system or by considering the galactic dynamics.(2) High energy photons propagating at cosmological distances interact differently with the gravitational field in the presence of multi-dimensional or non-riemannian geometries. Thus for these photons a supplementary time delay or a gravitational rotation of the polarization plan can be induced. In particular, gamma ray bursts are very good candidates for the study of these effects. We plan to study the transfer equation of radiation in space-times with more general geometries than the Riemannian one and in arbitrary dimensions and to obtain from the photon propagation data some constraints on the extra-dimensions. (3) Observations show that the rotational velocities increase near the center of the galaxy and then remain nearly constant at a value of around 200 km/s [8]. This behavior of the galactic rotation curves is explained by postulating the existence of some dark (invisible) matter, distributed in a spherical halo around the galaxies. We shall study the possibility that the behavior of the galactic rotation curves could be explained in the brane world model, due to the presence of the supplementary terms in the gravitational field equations. This could lead to the possibility of observationally testing gravitational theories with more than four dimensions by using the galactic rotation curves. A systematic comparison between the predictions of the brane-world model and observational results will be considered in detail. References[1] L. Randall and R. Sundrum, Phys. Rev. Lett. {\bf 83}, 3370 (1999).[2] L. Randall and R. Sundrum, Phys. Rev. Lett {\bf 83}, 4690 (1999).[3] C. M. Chen, T. Harko, W. F. Kao and M. K. Mak, Nucl. Phys. {\bf B636}, 159 (2002).[4] C. M. Chen, T. Harko and M. K. Mak, Phys. Rev. {\bf D64}, 044013 (2001).[5] R. Maartens, Phys. Rev. {\bf D62}, 084023 (2000).[6] A. Campos and C. F. Sopuerta, Phys. Rev. {\bf D63}, 104012 (2001).[7] C. M. Chen, T. Harko and M. K. Mak, Phys. Rev. {\bf D64}, 124017 (2001).[8] J. Binney and S. Tremaine, Galactic dynamics, Princeton, Princeton University Press, (1987)

List of Research Outputs

Boehmer C.G. and Harko T.C., Dynamical instability of fluid spheres in the presence of a cosmological constant, Physical Review D. 2005, 71: 084026.

Cheng K.S. and Harko T.C., Is there any evidence for extra-dimensions or quantum gravity effects from the delayedMeV-GeV photons in GRB 940217?, Astroparticle Physics. Amsterdam, Elsevier B.V., 2004, 22: 297-305.

Cheng K.S., Harko T.C., Yuan Y.F. and Tang A.P.S., Orbital decay of a binary system consisting of spin-down neutron stars, Astrophysics and Space Science. Netherlands, Kluwer Academic Publishers, 2004, 294: 151-176.

Cheng K.S., Harko T.C. and Wang X.Y., Radiation transport equations in non-Riemannian space-times, Physical Review D. 2005, 71: 103001.

Harko T.C. and Cheng K.S., Constraints on extra-dimensions and variable constants from cosmological gamma-ray bursts, Astrophysics and Space Science. Springer, 2005, 297: 319-326.

Harko T.C. and Cheng K.S., Photon emissivity of the electrosphere of bare strange stars, The Astrophysical Journal. The American Astronomical Society, 2005, 622: 1033-1043.

Harko T.C. and Cheng K.S., Time delay of photons of different energies in multidimensional cosmological models, The Astrophysical Journal. The American Astronomical Society, 2004, 611: 633-641.

Mak M.K. and Harko T.C., Can the galactic rotation curves be explained in brane world models?, Physical Review D. New York, The American Physical Society, 2004, 70: 024010:1-12.

Mak M.K. and Harko T.C., Chaplygin gas dominated anisotropic brane world cosmological models, Physical Review D. 2005, 71: 104022.

Usov V.V., Harko T.C. and Cheng K.S., Structure of the electrospheres of bare strange stars, The Astrophysical Journal. The American Astronomical Society, 2005, 620: 915-921.

Researcher : Ho KF

List of Research Outputs

Ho K.F., Some positron annihilation studies on highly doped and supersaturated n-type silicon. Hong Kong, The University of Hong Kong, 2004, 1-254.

Researcher : Ho KH

List of Research Outputs

Ho K.H., Extracting real market behavior in complex adaptive systems through minority game. Hong Kong, The University of Hong Kong, 2004, 1-71.

Ho K.H., Man W.C., Chow F.K. and Chau H.F., Memory is relevant in the symmetric phase of the minority game, Physical Review E. New York, The American Physical Society, 2005, 71: 066120: 1-5.

Ho K.H., Chow F.K. and Chau H.F., Wealth inequality in the minority game, Physical Review E. New York, The American Physical Society, 2004, 70: 066110:1-7.

Researcher : Hu F

List of Research Outputs

Gao J. and Hu F., Current-induced metastable resistive state in epitaxial thin films of La_1-xCa_xMnO₃ (x=0.2, 0.3), Applied Physics Letters. New York, American Institute of Physics, 2005, 86: 092504:1-3.

Gao J. and Hu F., Current-sensitive electroresistance and the response to a magnetic field in La_0.8Ca_0.2MnO₃ epitaxial thin films, Journal of Applied Physics. New York, American Institute of Physics, 2005, 97: 10H706:1-3.

Hu F., Gao J., Qian X.L., llyn M., Tishin A.M., Sun J.R. and Shen B.G., Magnetocaloric effect in itinerant electron metamagnetic systems La(Fe_1-xCo_x)_11.9Si_1.1, Journal of Applied Physics. New York, American Institute of Physics, 2005, 97: 10M303:1-3.

Hu F., Gao J., Qian X.L., Li Y.X., Du J., Sun J.R. and Shen B.G., Magnetoresistance in LaFe_11.2Co_0.7Si_1.1 compound, IEEE Transactions on Magnetics. IEEE, 2004, 40: 2754-2756.

Researcher : Hu L

List of Research Outputs

Hu L., Gao J. and Shen S.Q., Effects of spin imbalance on the electric-field-driven quantum dissipationless spin current in p-doped semiconductors, Physical Review B. New York, The American Physical Society, 2004, 70: 235323:1-8.

Ma X., Hu L., Tao R.B. and Shen S.Q., Influences of spin accumulation on the intrinsic spin Hall effect in two-dimensional electron gases with Rashba spin-orbit coupling, Physical Review B. New York, The American Physical Society, 2004, 70: 195343:1-7.

Researcher : Huang Y

List of Research Outputs

Huang Y., Chen X., Fung S.H.Y., Beling C.D., Ling F.C.C., Dai X. and Xie M.H., Current transport property of n-GaN/n-6H-SiC heterojunction: Influence of interface states, Applied Physics Letters. New York, American Institute of Physics, 2005, 86: 122102:1-3.

Huang Y., Chen X., Fung S.H.Y., Beling C.D. and Ling F.C.C., Spatial characterization of a 2 in GaN wafer by Raman spectroscopy and capacitance-voltage measurements, Journal of Physics D: Applied Physics. Bristol, IOP Publishing Limited, 2004, 37: 2814-2818.

Huang Y., Chen X., Fung S.H.Y., Beling C.D., Ling F.C.C., Wei Z., Xu S. and Zhi C., The depth-profiled carrier concentration and scattering mechanism in undoped GaN film grown on sapphire, Journal of Applied Physics. New York, American Institute of Physics, 2004, 96: 1120-1126.

Wang K., Wang R., Fung S.H.Y., Beling C.D., Chen X., Huang Y., Li S., Xu S.J. and Gong M., Film thickness degradation of Au/GaN Schottky contact characteristics, Materials Science and Engineering B. Amsterdam, Elsevier B.V., 2005, 117: 21-25.

Researcher : Hui IP

List of Research Outputs

Weng H., Ling F.C.C., Beling C.D., Fung S.H.Y., Cheung C.K., Kwan P.Y.R. and Hui I.P., Tungsten mesh as positron transmission moderator in a monoenergetic positron beam, Nuclear Instruments and Methods in Physics Research B. Amsterdam, Elsevier B.V., 2004, 225: 397-401.

Researcher : Jiang Z

List of Research Outputs

Wang W., Jiang Z. and Cheng K.S., Contribution to diffuse gamma-rays in the Galactic Centre region from unresolved millisecond pulsars, Monthly Notices of the Royal Astronomical Society. London, Royal Astronomical Society, 2005, 358: 263-269.

Wang W., Jiang Z., Pun J.C.S. and Cheng K.S., Possible TeV source candidates among the unidentified EGRET sources, Monthly Notices of the Royal Astronomical Society. London, Royal Astronomical Society, 2005, 360: 646-654.

Researcher : Kwan PYR

List of Research Outputs

Weng H., Ling F.C.C., Beling C.D., Fung S.H.Y., Cheung C.K., Kwan P.Y.R. and Hui I.P., Tungsten mesh as positron transmission moderator in a monoenergetic positron beam, Nuclear Instruments and Methods in Physics Research B. Amsterdam, Elsevier B.V., 2004, 225: 397-401.

Researcher : Kwong CY

List of Research Outputs

Djurisic A., Choy W.C.H., Roy V. .A. .L., Leung Y.H., Kwong C.Y., Cheah K. .W., Gundu Rao T. .K., Chan W.K., Lui H. .F. and Surya C., Photoluminescence and EPR of ZnO tetrapod nano-structures, Advanced Funct. Mater.. 2004, 14: 856-864.

Wang R., Beling C.D., Fung S.H.Y., Djurisic A., Ling F.C.C., Kwong C.Y. and Li S., Influence of annealing temperature and environment on the properties of indium tin oxide thin films, Journal of Physics D: Applied Physics. Bristol, IOP Publishing Limited, 2005, 38: 2000-2005.

Researcher : Lam CH

List of Research Outputs

Lam C.H., Lam T.W., Ling F.C.C., Fung S.H.Y., Beling C.D., Hang D.S. and Weng H.M., Positron lifetime studies on 8 MeV electron-irradiated n-type 6H silicon carbide, Journal of Physics: Condensed Matter. Bristol, IOP Publishing Limited, 2004, 16: 8409-8419.

Researcher : Lam TW

List of Research Outputs

Lam C.H., Lam T.W., Ling F.C.C., Fung S.H.Y., Beling C.D., Hang D.S. and Weng H.M., Positron lifetime studies on 8 MeV electron-irradiated n-type 6H silicon carbide, Journal of Physics: Condensed Matter. Bristol, IOP Publishing Limited, 2004, 16: 8409-8419.

Researcher : Lam TY

List of Research Outputs

Lam T.Y., Observational studies of supernova 1998S. Hong Kong, The University of Hong Kong, 2004, 1-78.

Researcher : Lau WP

List of Research Outputs

Lau W.P., Direct determination of the 6H-SiC(0001)-3 x 3 and 6H-SiC(0001)- (sqrt{3} x sqrt{3}) surface reconstruction by LEED Patterson function. Hong Kong, The University of Hong Kong, 2004, 1-75.

Researcher : Lee KM

List of Research Outputs

Cheng K.S., Chau H.F., Lee K.M. and Chan K.H., Nature of the universe CD ROM year 2004 edition. Hong Kong, Department of Physics, HKU and Hong Kong Space Museum, HKSAR, 2004.

Researcher : Leung JKC

Project Title:	A complete solution for assessing the radiation hazard of Rn-220 and its progeny in Hong Kong
Investigator(s):	Leung JKC
Department:	Physics
Source(s) of Funding:	Incentive Award for RGC CERG Fundable But Not Funded Projects
Start Date:	07/2003

Abstract:

To do a territory-wide survey of indoor 220Rn concentration in Hong Kong; to develop practical protocols for assessing the radiation hazard of indoor 220Rn and its progenies; to build a 220Rn exposure chamber suitable for calibrating all types of 220Rn measuring equipment; to assess the radiation hazard due to 220Rn and its progeny in Hong Kong; to recommend mitigation methods for reducing radiation hazard of indoor 220Rn and its progeny.

Project Title:	Muon-induced neutron background in Gd-doped liquid scintillator in an underground laboratory
Investigator(s):	Leung JKC, Pun JCS, Chu MC, Luk KB
Department:	Physics
Source(s) of Funding:	Seed Funding Programme for Basic Research
Start Date:	02/2005

Abstract:

Purpose: To study the muon-induced neutron background in Gd-doped liquid scintillator in an underground laboratory inside Aberdeen Tunnel (Aberdeen Lab).Key issues and problems being addressed: Recent discoveries have shown that neutrinos are massive and that it can oscillate between 3 neutrino species (electron neutrino; muon neutrino and tau neutrino). Mixing among the flavours has been observed in atmospheric and solar neutrinos in experiments such as Super-K and SNO as well as in experiments using man-made neutrino sources including KamLAND and K2K. In the neutrino mixing matrix, all but two parameters have been measured: the smallest mixing angle, theta-13, and the value of the CP violating phase, are not yet known. In order to advance our knowledge in neutrino physics and indeed the nature of dark matters in the universe, a few collaborations in the world have been formed and started the race for determining theta-13. China with Hong Kong and US have formed a collaboration to measure the mixing angle using anti-neutrinos produced by the reactors of the Daya Bay and Ling Ao nuclear power plants. (Please refer to http://dayawane.ihep.ac.cn/ for details). We are convinced that the Daya Bay site is the best and most promising one because it is one of the largest reactor groups in the world and the mountain next to the site provides sufficient overburden for minimizing the cosmic background effects.Because of the small interaction cross-section of neutrinos, event rate at the neutrino detectors will be extremely small, hence suppression of background and false events are crucial to the success of the experiments. The reactor neutrino-oscillation experiments, CHOOZ, Palo Verde (Boehm et al, 2000) and the KamLAND (Alivisatos et al, 1998), have shown that muon-induced neutrons are serious background events. In this proposal we will investigate the production and the properties of the background neutrons produced inside a liquid scintillator of the same type that will be used in the future Daya Bay experiment. The experiment will be done inside the Aberdeen Lab which has an overburden of 250 m of rock and geology, close to that of the proposed near-detector sites in the Daya Bay neutrino project. We expect to obtain reliable data within about one and a half year, just good enough to be incorporated into the fabrication of the future Daya Bay detectors.References:Boehm, F., et al, Search for Neutrino Oscillations at the Palo Verde Nuclear Reactors. Phys. Rev. Lett, 84, 3764-3767, 2000.Alivisatos, P. et al., KamLAND: a Liquid Scintillator AntiNeutrino Detector at the Kamioka site. Report No. Stanford-HEP-98-03, Tohoku-RCNS-98-15, 1998.

Researcher : Leung YH

List of Research Outputs

Cai X., Djurisic A., Xie M.H., Liu H., Zhang X.X., Zhu J.J., Yang H. and Leung Y.H., Magnetic doping and characterization of n-type GaN, AIP Conference Proceedings. New York, American Institute of Physics, 2005, 772: 319-320.

Cheung C.H., Djurisic A., Leung Y.H., Wei Z., Xu S. and Chan W.K., Tris(8-hydroxyquinoline) aluminium nanowires: a simple synthesis method, Chemical Physics Letters. Amsterdam, Elsevier B.V., 2004, 394: 203-206.

Chu X.F., Jiang D.L., Djurisic A. and Leung Y.H., Gas-sensing properties of thick film based on ZnO nano-tetrapods, Chemical Physics Letters. Amsterdam, Elsevier B.V., 2005, 401: 426-429.

Djurisic A., Leung Y.H., Liu Z., Li D., Xie M.H., Choy W.C.H. and Cheah K.W., Green photoluminescence in ZnO nanostructures, AIP Conference Proceedings. New York, American Institute of Physics, 2005, 772: 889-890.

Djurisic A., Choy W.C.H., Roy V. .A. .L., Leung Y.H., Kwong C.Y., Cheah K. .W., Gundu Rao T. .K., Chan W.K., Lui H. .F. and Surya C., Photoluminescence and EPR of ZnO tetrapod nano-structures, Advanced Funct. Mater.. 2004, 14: 856-864.

Djurisic A., Choy W.C.H., Roy V.A.L., Leung Y.H., Kwong C.Y., Cheah K.W., Rao T.K.G., Chan W.K., Lui H.F. and Surya C., Photoluminescence and electron paramagnetic resonance of ZnO tetrapod structures, Advanced Functional Materials. Weinheim, WILEY-VCH Verlag GmbH & Co., 2004, 14: 856-864.

Leung Y.H., Djurisic A., Cheung C.H., Xie M.H. and Chan W.K., Growth of N, N'-di(naphthalene-1-yl)-N, N'-diphenyl-benzidine dome structures, Journal of Applied Physics. New York, American Institute of Physics, 2005, 97: 033515:1-5.

Leung Y.H., Djurisic A., Choy W.C.H., Xie M.H., Gao J., Cheah K.W., Man K.K.Y. and Chan W.K., Synthesis and properties of ZnO multipod structures, Journal of Crystal Growth. Amsterdam, Elsevier B.V., 2005, 274: 430-437.

Leung Y.H., Djurisic A. and Xie M.H., Synthesis and properties of ZnO nano-ribbon and comb structures, AIP Conference Proceedings. New York, American Institute of Physics, 2005, 772: 879-880.

Leung Y.H., Kwok W.M., Djurisic A., Phillips D.L. and Chan W.K., Time-resolved study of stimulated emission in ZnO tetrapod nanowires, Nanotechnology. Bristol, IOP Publishing Limited, 2005, 16: 579-582.

Leung Y.H., Djurisic A., Gao J., Xie M.H., Wei Z., Xu S. and Chan W.K., Zinc oxide ribbon and comb structures: synthesis and optical properties, Chemical Physics Letters. Amsterdam, Elsevier B.V., 2004, 394: 452-457.

Leung Y.H., Djurisic A., Xie M.H., Kwong C.Y. and Chan W.K., ZnO nanostructures prepared from ZnO:CNT mixtures, Proceedings of SPIE. Bellingham, SPIE, 2004, 5510: 1-8.

Li D., Leung Y.H., Djurisic A., Liu Z., Xie M.H., Shi S., Xu S. and Chan W.K., Different origins of visible luminescence in ZnO nanostructures fabricated by the chemical and evaporation methods, Applied Physics Letters. New York, American Institute of Physics, 2004, 85: 1601-1603.

Researcher : Leung YH

List of Research Outputs

Chu X.F., Jiang D.L., Djurisic A. and Leung Y.H., Gas-sensing properties of thick film based on ZnO nano-tetrapods, Chemical Physics Letters. Amsterdam, Elsevier B.V., 2005, 401: 426-429.

Leung Y.H., Djurisic A. and Xie M.H., Synthesis and properties of ZnO nano-ribbon and comb structures, AIP Conference Proceedings. New York, American Institute of Physics, 2005, 772: 879-880.

Leung Y.H., Djurisic A., Xie M.H., Kwong C.Y. and Chan W.K., ZnO nanostructures prepared from ZnO:CNT mixtures, Proceedings of SPIE. Bellingham, SPIE, 2004, 5510: 1-8.

Researcher : Li D

List of Research Outputs

Djurisic A., Leung Y.H., Liu Z., Li D., Xie M.H., Choy W.C.H. and Cheah K.W., Green photoluminescence in ZnO nanostructures, AIP Conference Proceedings. New York, American Institute of Physics, 2005, 772: 889-890.

Kwong C.Y., Djurisic A., Choy W.C.H., Li D., Xie M.H., Chan W.K., Cheah K.W., Lai P.T. and Chui P.C., Efficiency and stability of different tris(8-hydroxyquinoline) aluminium (Alq₃) derivatives in OLED applications, Materials Science and Engineering B. Amsterdam, Elsevier B.V., 2005, 116: 75-81.

Li D., Leung Y.H., Djurisic A., Liu Z., Xie M.H., Shi S., Xu S. and Chan W.K., Different origins of visible luminescence in ZnO nanostructures fabricated by the chemical and evaporation methods, Applied Physics Letters. New York, American Institute of Physics, 2004, 85: 1601-1603.

Researcher : Li D

List of Research Outputs

Researcher : Li G

List of Research Outputs

Xu S.J., Li G., Xiong S., Tong D.S.Y., Che C.M., Liu W. and Li M.F., Spectral features of LO phonon sidebands in luminescence of free excitons in GaN, The Journal of Chemical Physics. New York, American Institute of Physics, 2005, 122: 244712: 1-5.

Researcher : Li J

List of Research Outputs

Li J., Hu L.B. and Shen S.Q., Spin-resolved Hall effect driven by spin-orbit coupling, Physical Review B (Rapid Communications). New York, The American Physical Society, 2005, 71: 241305: 1-4.

Researcher : Li P

List of Research Outputs

Li P. and Shen S.Q., Contractor renormalization group theory of SU(N) chains and ladders, Physical Review B (Brief Reports). New York, The American Physical Society, 2005, 71: 212401:1-4.

Li P. and Shen S.Q., Two-dimensional gapless spin liquids in frustrated SU(N) quantum magnets, New Journal of Physics. Bristol, IOP Publishing Limited, 2004, 6: 1-13.

Ma Z., Li P. and Shen S.Q., Spintronic Faraday rotation spectroscopy and geometrical modulation of spin current in an Aharonov-Casher ring, Physical Review B. New York, The American Physical Society, 2004, 70: 125318:1-7.

Researcher : Li Q

List of Research Outputs

Xu S.J., Wang Y., Li Q., Zhang X.H., Liu W. and Chua S.J., Direct observation and theoretical interpretation of strongly enhanced lateral diffusion of photogenerated carriers in InGaN/GaN quantum well structures, Applied Physics Letters. New York, American Institute of Physics, 2005, 86: 071905:1-3.

Researcher : Li S

List of Research Outputs

Wang K., Wang R., Fung S.H.Y., Beling C.D., Chen X., Huang Y., Li S., Xu S.J. and Gong M., Film thickness degradation of Au/GaN Schottky contact characteristics, Materials Science and Engineering B. Amsterdam, Elsevier B.V., 2005, 117: 21-25.

Wang R., Beling C.D., Fung S.H.Y., Djurisic A., Ling F.C.C., Kwong C.Y. and Li S., Influence of annealing temperature and environment on the properties of indium tin oxide thin films, Journal of Physics D: Applied Physics. Bristol, IOP Publishing Limited, 2005, 38: 2000-2005.

Wang R., Beling C.D., Fung S.H.Y., Djurisic A., Ling F.C.C. and Li S., Influence of gaseous annealing environment on the properties of indium-tin-oxide thin films, Journal of Applied Physics. New York, American Institute of Physics, 2005, 97: 033504:1-5.

Researcher : Ling FCC

Project Title:	Positron annihilation spectroscopic studies of vacancy type defects in 6H-SiC: microstructural investigation of the material's deep level defects
Investigator(s):	Ling FCC, Beling CD, Brauer G.
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	12/2001
Completion Date:	11/2004

Abstract:

To identify and characterize the vacancy type defects in electron irradiated and ion-implanted 6H-SiC material with the use of the positron lifetime spectroscopy and the Doppler broadening technique; to correlate the PAS results with the DLTS results in order to clarify the ambiguity of the physical microstructure of the deep levels observed by DLTS.

Project Title:	Gaining direct chemical information around the vacancy defects in compound semiconductors by observing the corresponding positron-core-electron annihilation [gamma] radiation
Investigator(s):	Ling FCC, Beling CD
Department:	Physics
Source(s) of Funding:	Small Project Funding
Start Date:	11/2002
Completion Date:	10/2004

Abstract:

To eliminate the background events by using the coincident technique and thus make the core electron spectroscopy becoking feasible; to employ this newly proposed technique to study the microstructure of vacancies in compound semiconductors.

Project Title:	Experimental studies of native defects in gallium antimonide
Investigator(s):	Ling FCC
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	12/2002
Completion Date:	12/2004

Abstract:

The project investigates the native defectsin GaSb with the four techniques, namely positron lifetime, deep level transient spectroscopy (DLTS), hall measurement, and photoluminescence. Correlation between defects detected by different spectroscopies will also be studied.

Project Title:	Threshold electron energy of defects in silicon carbide induced by electron irradiation: an approach to investigate the microstructures of some defects
Investigator(s):	Ling FCC, Chen X
Department:	Physics
Source(s) of Funding:	Small Project Funding
Start Date:	11/2003

Abstract:

To investigate the defects' physical identities in semiconductor, which plays a crucial role in determining the materials's electrical and optical properties, by monitoring the electron energy dependence of generating these defects in the energy range close to the defects' threshold displacement energies.

Project Title:	Carbon vacancy defect and carbon interstitial defect in silicon carbide: unambiguous determination of their signature photoluminescence lines
Investigator(s):	Ling FCC
Department:	Physics
Source(s) of Funding:	Small Project Funding
Start Date:	11/2004

Abstract:

To measure the signature luminescence lines of the carbon vacancy and the carbon interstitial in the photoluminescence spectrum.

Project Title:	Experimental studies of defects in ZnO: electrical and optical activities of O-vacancy and Zn-vacancy related defects
Investigator(s):	Ling FCC, Xu SJ, Chen X
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	12/2004

Abstract:

To identify and characterize different defects in as-grown and particle irradiated ZnO. Annealing behaviors of the defects will also be investigated; to study the correlation between the identified defects and to investigate their microstructure; to study the involvement of O-vacancy and Zn-vacancy in PL transition; to study the role of O-vacancy and Zn-vacancy in determining the material electrical properties.

Project Title:	Experimental studies of defects in ZnO: electrical and optical activities of O-vacancy and Zn-vacancy related defects
Investigator(s):	Ling FCC
Department:	Physics
Source(s) of Funding:	Merit Award for RGC CERG Funded Projects
Start Date:	01/2005

Abstract:

Refer to hard copy

List of Research Outputs

Chen X., Ling F.C.C., Gong M., Fung S.H.Y., Beling C.D., Brauer G., Anwand W. and Skorupa W., Anomalous behaviors of E₁/E₂ deep level defects in 6H silicon carbide, Applied Physics Letters. New York, American Institute of Physics, 2005, 86: 031903:1-3.

Chen X., Ling F.C.C., Fung S.H.Y. and Beling C.D., Electrically active deep level defects in 6H silicon carbide, Tenth National Seminar on Crystal Growth, Indian Association for Crystal Growth. Tamilnadu, Kongu Engineering College, 2005, 4.

Huang Y., Chen X., Fung S.H.Y., Beling C.D., Ling F.C.C., Dai X. and Xie M.H., Current transport property of n-GaN/n-6H-SiC heterojunction: Influence of interface states, Applied Physics Letters. New York, American Institute of Physics, 2005, 86: 122102:1-3.

Huang Y., Chen X., Fung S.H.Y., Beling C.D. and Ling F.C.C., Spatial characterization of a 2 in GaN wafer by Raman spectroscopy and capacitance-voltage measurements, Journal of Physics D: Applied Physics. Bristol, IOP Publishing Limited, 2004, 37: 2814-2818.

Huang Y., Chen X., Fung S.H.Y., Beling C.D., Ling F.C.C., Wei Z., Xu S. and Zhi C., The depth-profiled carrier concentration and scattering mechanism in undoped GaN film grown on sapphire, Journal of Applied Physics. New York, American Institute of Physics, 2004, 96: 1120-1126.

Lam C.H., Lam T.W., Ling F.C.C., Fung S.H.Y., Beling C.D., Hang D.S. and Weng H.M., Positron lifetime studies on 8 MeV electron-irradiated n-type 6H silicon carbide, Journal of Physics: Condensed Matter. Bristol, IOP Publishing Limited, 2004, 16: 8409-8419.

Ling F.C.C., Chen X., Fung S.H.Y., Beling C.D., Brauer G., Anwand W., Skorupa W. and Gong M., Deep level defects E₁/E₂ in n-type 6H silicon carbide induced by electron radiation and He-implantation, Physics of Semiconductors: 27th International Conference on the Physics of Semiconductors, Flagstaff, Arizona, 26-30 July 2004. New York, American Institute of Physics, 2005, 99-100.

Ling F.C.C., Chen X., Fung S.H.Y., Beling C.D., Gong M., Ge W.K., Wang J.N., Brauer G., Anwand W. and Skorupa W., Deep level defects in 6H silicon carbide, 六方碳化硅中的深能级缺陷, Physics. 物理, Beijing, Chinese Physical Society, 2004, 33: 786-790.

Ling F.C.C., Lui M.K.P. and Ma S.K.M., Ga vacancy related defects and shallow acceptors in undoped gallium antimonide, 9th National Conference on Positron Annihilation, P.R. China. Shaoxing, Shaoxing University, 2005, 223.

Ling F.C.C., Lui M.K.P., Ma S.K.M., Chen X., Fung S.H.Y. and Beling C.D., Nature of the acceptor responsible for p-type conduction in liquid encapsulatedCzochralski-grown undoped gallium antimonide, Applied Physics Letters. New York, American Institute of Physics, 2004, 85: 384-386.

Ma S.K.M., Lui M.K.P., Ling F.C.C., Fung S.H.Y., Beling C.D., Li K.F., Cheah K.W., Gong M., Hang H.S. and Weng H.M., Electron irradiated liquid encapsulated Czochralski grown undoped gallium antimonide studied by positron lifetime spectroscopy and photoluminescence, Journal of Physics: Condensed Matter. Bristol, IOP Publishing Limited, 2004, 16: 6205-6212.

Wang H., Weng H.M., Ling F.C.C., Ye B.J., Zhou X.Y. and Han R.D., Annealing study of A1/GaSb contact with the use of doppler broadening technique, Acta Physica Polonica A. Poland, The Polish Physical Society, 2005, 107: 874-879.

Wang R., Beling C.D., Fung S.H.Y., Djurisic A., Ling F.C.C., Kwong C.Y. and Li S., Influence of annealing temperature and environment on the properties of indium tin oxide thin films, Journal of Physics D: Applied Physics. Bristol, IOP Publishing Limited, 2005, 38: 2000-2005.

Wang R., Beling C.D., Fung S.H.Y., Djurisic A., Ling F.C.C. and Li S., Influence of gaseous annealing environment on the properties of indium-tin-oxide thin films, Journal of Applied Physics. New York, American Institute of Physics, 2005, 97: 033504:1-5.

Weng H., Ling F.C.C., Beling C.D., Fung S.H.Y., Cheung C.K., Kwan P.Y.R. and Hui I.P., Tungsten mesh as positron transmission moderator in a monoenergetic positron beam, Nuclear Instruments and Methods in Physics Research B. Amsterdam, Elsevier B.V., 2004, 225: 397-401.

Researcher : Liu Y

List of Research Outputs

Cao Y., Xu S., Lu W., Dai X., Chan Y.F., Wang N., Liu Y., Wu H.S., Xie M.H. and Tong S.Y., In situ revelation of a zinc-blende InN wetting layer during Stranski-Krastanov growth on GaN(0001) by molecular-beam epitaxy, Physical Review B. New York, The American Physical Society, 2005, 71: 155322:1-5.

Liu Y., Xie M.H., Cao Y., Wu H.S. and Tong S.Y., A study of In_xGa_1-xN growth by reflection high-energy electron diffraction, Journal of Applied Physics. New York, American Institute of Physics, 2005, 97: 023502:1-5.

Liu Y., Cao Y., Wu H.S., Xie M.H. and Tong S.Y., Coherent and dislocated three-dimensional islands of In_xGa_1-xN self-assembled on GaN(0001) during molecular-beam epitaxy, Physical Review B (Brief Reports). New York, The American Physical Society, 2005, 71: 153406:1-4.

Researcher : Liu Y

List of Research Outputs

Researcher : Liu Z

List of Research Outputs

Cheung C.H., Djurisic A., Kwong C.Y., Tam H.L., Cheah K.W., Liu Z., Chan W.K., Chui P.C., Chan J. and Rakic A.D., Change of the emission spectra in organic light-emitting diodes by layer thickness modification, Applied Physics Letters. New York, American Institute of Physics, 2004, 85: 2944-2946.

Cheung C.H., Djurisic A., Kwong C.Y., Tam H.L., Cheah K.W., Liu Z., Chan W.K., Chui P.C., Chan J. and Rakic A.D., Reduced angular dependence of the emission from tris(8-hydroxyquinoline) aluminum based microcavity, Optics Communications. Amsterdam, Elsevier B.V., 2005, 248: 287-293.

Djurisic A., Leung Y.H., Liu Z., Li D., Xie M.H., Choy W.C.H. and Cheah K.W., Green photoluminescence in ZnO nanostructures, AIP Conference Proceedings. New York, American Institute of Physics, 2005, 772: 889-890.

Djurisic A., Kwong C.Y., Cheung C.H., Tam H.L., Cheah K.W., Liu Z., Chan W.K. and Chui P.C., Near-infrared emission from tris(8-hydroxyquinoline) aluminum based microcavity light emitting diodes, Chemical Physics Letters. Amsterdam, Elsevier B.V., 2004, 399: 446-450.

Li D., Leung Y.H., Djurisic A., Liu Z., Xie M.H., Shi S., Xu S. and Chan W.K., Different origins of visible luminescence in ZnO nanostructures fabricated by the chemical and evaporation methods, Applied Physics Letters. New York, American Institute of Physics, 2004, 85: 1601-1603.

Liu Z., Kwong C.Y., Cheung C.H., Djurisic A., Chan Y. and Chui P.C., The characterization of the optical functions of BCP and CBP thin films by spectroscopic ellipsometry, Synthetic Metals. Amsterdam, Elsevier B.V., 2005, 150: 159-163.

Researcher : Lui CK

List of Research Outputs

Lui C.K., Transport properties of hybrid mesoscopic systems. Hong Kong, The University of Hong Kong, 2004, 1-67.

Lui C.K., Wang B.G. and Wang J., ac transport through a resonant level between ferromagnetic electrodes, Physical Review B. New York, The American Physical Society, 2004, 70: 205316:1-8.

Researcher : Lui CK

List of Research Outputs

Lui C.K., Transport properties of hybrid mesoscopic systems. Hong Kong, The University of Hong Kong, 2004, 1-67.

Lui C.K., Wang B.G. and Wang J., ac transport through a resonant level between ferromagnetic electrodes, Physical Review B. New York, The American Physical Society, 2004, 70: 205316:1-8.

Researcher : Lui MKP

List of Research Outputs

Ling F.C.C., Lui M.K.P. and Ma S.K.M., Ga vacancy related defects and shallow acceptors in undoped gallium antimonide, 9th National Conference on Positron Annihilation, P.R. China. Shaoxing, Shaoxing University, 2005, 223.

Ling F.C.C., Lui M.K.P., Ma S.K.M., Chen X., Fung S.H.Y. and Beling C.D., Nature of the acceptor responsible for p-type conduction in liquid encapsulatedCzochralski-grown undoped gallium antimonide, Applied Physics Letters. New York, American Institute of Physics, 2004, 85: 384-386.

Lui M.K.P., Acceptor defects in p-type gallium antimonide materials. Hong Kong, The University of Hong Kong, 2005, 1-144.

Ma S.K.M., Lui M.K.P., Ling F.C.C., Fung S.H.Y., Beling C.D., Li K.F., Cheah K.W., Gong M., Hang H.S. and Weng H.M., Electron irradiated liquid encapsulated Czochralski grown undoped gallium antimonide studied by positron lifetime spectroscopy and photoluminescence, Journal of Physics: Condensed Matter. Bristol, IOP Publishing Limited, 2004, 16: 6205-6212.

Researcher : Ma PW

List of Research Outputs

Ma P.W., Transport properties of InAs / (AlSb) / GaSb / (AlSb) / InAs heterostructure systems. Hong Kong, The University of Hong Kong, 2004, 1-61.

Researcher : Ma SKM

List of Research Outputs

Ling F.C.C., Lui M.K.P. and Ma S.K.M., Ga vacancy related defects and shallow acceptors in undoped gallium antimonide, 9th National Conference on Positron Annihilation, P.R. China. Shaoxing, Shaoxing University, 2005, 223.

Ling F.C.C., Lui M.K.P., Ma S.K.M., Chen X., Fung S.H.Y. and Beling C.D., Nature of the acceptor responsible for p-type conduction in liquid encapsulatedCzochralski-grown undoped gallium antimonide, Applied Physics Letters. New York, American Institute of Physics, 2004, 85: 384-386.

Ma S.K.M., Lui M.K.P., Ling F.C.C., Fung S.H.Y., Beling C.D., Li K.F., Cheah K.W., Gong M., Hang H.S. and Weng H.M., Electron irradiated liquid encapsulated Czochralski grown undoped gallium antimonide studied by positron lifetime spectroscopy and photoluminescence, Journal of Physics: Condensed Matter. Bristol, IOP Publishing Limited, 2004, 16: 6205-6212.

Researcher : Ma X

List of Research Outputs

Ma X., Hu L., Tao R.B. and Shen S.Q., Influences of spin accumulation on the intrinsic spin Hall effect in two-dimensional electron gases with Rashba spin-orbit coupling, Physical Review B. New York, The American Physical Society, 2004, 70: 195343:1-7.

Researcher : Ma Z

List of Research Outputs

Ma Z., Li P. and Shen S.Q., Spintronic Faraday rotation spectroscopy and geometrical modulation of spin current in an Aharonov-Casher ring, Physical Review B. New York, The American Physical Society, 2004, 70: 125318:1-7.

Researcher : Mak MK

List of Research Outputs

Mak M.K. and Harko T.C., Can the galactic rotation curves be explained in brane world models?, Physical Review D. New York, The American Physical Society, 2004, 70: 024010:1-12.

Mak M.K. and Harko T.C., Chaplygin gas dominated anisotropic brane world cosmological models, Physical Review D. 2005, 71: 104022.

Researcher : Man WC

List of Research Outputs

Ho K.H., Man W.C., Chow F.K. and Chau H.F., Memory is relevant in the symmetric phase of the minority game, Physical Review E. New York, The American Physical Society, 2005, 71: 066120: 1-5.

Man W.C., 魚洗證誠心﹖ — 共振玄機, 明報, Hong Kong, 明報, 2005, D15.

Researcher : Naik PS

List of Research Outputs

Naik P.S., Cheung C.K., Beling C.D. and Fung S.H.Y., A real-time S-parameter imaging system, Acta Physica Polonica A. Poland, The Polish Physical Society, 2005, 107: 761-768.

Researcher : Pun JCS

Project Title:	Understanding the nature of Supernova Remnant 1987A
Investigator(s):	Pun JCS
Department:	Physics
Source(s) of Funding:	Merit Award for RGC CERG Funded Projects
Start Date:	09/2003

Abstract:

To study the Supermove Remnant ( SNR 1987A) in detail to gain insight on the explosion mechanism of the progenitor star, final stages of stellar evolution, and interaction with the circumstellar environment; to study SNR1987A system in detail: the explosion debris, the circumstellar rings, and the interaction between delmis and ring.

Project Title:	Understanding the nature of Supernova Remnant 1987A
Investigator(s):	Pun JCS
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	09/2003

Abstract:

Project Title:	Observational Studies of Supernovae
Investigator(s):	Pun JCS
Department:	Physics
Source(s) of Funding:	Incentive Award for RGC CERG Fundable But Not Funded Projects
Start Date:	07/2004

Abstract:

Refer to hard copy

List of Research Outputs

Fransson C., Challis P.M., Chevalier R.A., Filippenko A.V., Kirshner R.P., Kozma C., Leonard D.C., Matheson T., Baron E., Garnavich P., Jha S., Leibundgut B., Lundqvist P., Pun J.C.S., Wang L.F. and Wheeler J.C., Hubble space telescope and ground-based observations of SN 1993J and SN 1998S: CNO processing in the progenitors, The Astrophysical Journal. The American Astronomical Society, 2005, 622: 991-1007.

Tam P.H., Pun J.C.S., Huang Y.F. and Cheng K.S., Early re-brightenings in GRB afterglows as signatures of low-to-high density boundary, New Astronomy. Amsterdam, Elsevier B.V., 2005, 10: 535-544.

Tam W.S., Pun J.C.S. and Chau H.F., The quality of night sky in Hong Kong, Hong Kong, The University of Hong Kong, 2004, 1-37.

Wang W., Jiang Z., Pun J.C.S. and Cheng K.S., Possible TeV source candidates among the unidentified EGRET sources, Monthly Notices of the Royal Astronomical Society. London, Royal Astronomical Society, 2005, 360: 646-654.

Researcher : Shen S

Project Title:	Colossal magnetoresistance and percolation
Investigator(s):	Shen SQ, Xie X.C.
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	09/2001
Completion Date:	08/2004

Abstract:

To understand the percolative transport properties and colossal magnetoresistance effect in ferromagnetic perovskite manganities.

Project Title:	Quantum ordered and disordered states in spin systems with orbital degeneracy
Investigator(s):	Shen SQ, Zhang F.C.
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	09/2002

Abstract:

This project attempts to understand the role of electronic orbital degree of freedom in formation of various novel quantum states in transition metal oxides, and to develop new theoretical techniques to study the quantum spin liquid states and incommensurate spin density wave states.

Project Title:	Decoherence and non-exponential relaxation of quantum tunnelling in nano-magnetic molecules
Investigator(s):	Shen SQ, Chen Z
Department:	Physics
Source(s) of Funding:	Small Project Funding
Start Date:	11/2002

Abstract:

To understand the physical mechanism of decoherence and non-exponential relaxation in quantum tunnelling in nano-magnetic molecules.

Project Title:	Local stray field and macroscopic quantum tunneling in nanometer-sized magnetic particles and clusters
Investigator(s):	Shen SQ
Department:	Physics
Source(s) of Funding:	Merit Award for RGC CERG Funded Projects
Start Date:	10/2003

Abstract:

To understand the role of environmental interaction in quantum tunneling and decoherence from the magnetization reversal in nanometer-sized clusters, to establish an efficient method to deduce microscopic parameters from the experimental data, to study the novel properties of newly synthesized supramolecular dimers, and to explore possible application in magnetic memory and information industry.

Project Title:	Local stray field and macroscopic quantum tunneling in nanometer-sized magnetic particles and clusters
Investigator(s):	Shen SQ
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	10/2003

Abstract:

Project Title:	Quantum spin transport and geometric phases
Investigator(s):	Shen SQ
Department:	Physics
Source(s) of Funding:	Small Project Funding
Start Date:	11/2003

Abstract:

To understand the relation between quantum spin transport and geometric phases in some mesocopic structures where spin and charge currents could arise from the spin interference.

Project Title:	Exact real space renormalization group transformation and its application to the spin and electron lattice systems
Investigator(s):	Shen SQ
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	10/2004

Abstract:

To develop a non-perturbative theory for the spin and electron lattices in strongly correlated electron systems.

Project Title:	Generation and coherent control of spin current in metals and semiconductors
Investigator(s):	Shen SQ
Department:	Physics
Source(s) of Funding:	Small Project Funding
Start Date:	11/2004

Abstract:

To investigate spin transport in metals and semiconductors, and to explore possible measurement of pure spin current.

Project Title:	Exact real space renormalization group transformation and its application to the spin and electron lattice systems
Investigator(s):	Shen SQ
Department:	Physics
Source(s) of Funding:	Merit Award for RGC CERG Funded Projects
Start Date:	01/2005

Abstract:

Refer to hard copy

Researcher : Shen SQ

Project Title:	Colossal magnetoresistance and percolation
Investigator(s):	Shen SQ, Xie X.C.
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	09/2001
Completion Date:	08/2004

Abstract:

To understand the percolative transport properties and colossal magnetoresistance effect in ferromagnetic perovskite manganities.

Project Title:	Quantum ordered and disordered states in spin systems with orbital degeneracy
Investigator(s):	Shen SQ, Zhang F.C.
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	09/2002

Abstract:

Project Title:	Decoherence and non-exponential relaxation of quantum tunnelling in nano-magnetic molecules
Investigator(s):	Shen SQ, Chen Z
Department:	Physics
Source(s) of Funding:	Small Project Funding
Start Date:	11/2002

Abstract:

To understand the physical mechanism of decoherence and non-exponential relaxation in quantum tunnelling in nano-magnetic molecules.

Project Title:	Local stray field and macroscopic quantum tunneling in nanometer-sized magnetic particles and clusters
Investigator(s):	Shen SQ
Department:	Physics
Source(s) of Funding:	Merit Award for RGC CERG Funded Projects
Start Date:	10/2003

Abstract:

Project Title:	Local stray field and macroscopic quantum tunneling in nanometer-sized magnetic particles and clusters
Investigator(s):	Shen SQ
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	10/2003

Abstract:

Project Title:	Quantum spin transport and geometric phases
Investigator(s):	Shen SQ
Department:	Physics
Source(s) of Funding:	Small Project Funding
Start Date:	11/2003

Abstract:

To understand the relation between quantum spin transport and geometric phases in some mesocopic structures where spin and charge currents could arise from the spin interference.

Project Title:	Exact real space renormalization group transformation and its application to the spin and electron lattice systems
Investigator(s):	Shen SQ
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	10/2004

Abstract:

To develop a non-perturbative theory for the spin and electron lattices in strongly correlated electron systems.

Project Title:	Generation and coherent control of spin current in metals and semiconductors
Investigator(s):	Shen SQ
Department:	Physics
Source(s) of Funding:	Small Project Funding
Start Date:	11/2004

Abstract:

To investigate spin transport in metals and semiconductors, and to explore possible measurement of pure spin current.

Project Title:	Exact real space renormalization group transformation and its application to the spin and electron lattice systems
Investigator(s):	Shen SQ
Department:	Physics
Source(s) of Funding:	Merit Award for RGC CERG Funded Projects
Start Date:	01/2005

Abstract:

Refer to hard copy

List of Research Outputs

Hu L., Gao J. and Shen S.Q., Effects of spin imbalance on the electric-field-driven quantum dissipationless spin current in p-doped semiconductors, Physical Review B. New York, The American Physical Society, 2004, 70: 235323:1-8.

Li J., Hu L.B. and Shen S.Q., Spin-resolved Hall effect driven by spin-orbit coupling, Physical Review B (Rapid Communications). New York, The American Physical Society, 2005, 71: 241305: 1-4.

Li P. and Shen S.Q., Contractor renormalization group theory of SU(N) chains and ladders, Physical Review B (Brief Reports). New York, The American Physical Society, 2005, 71: 212401:1-4.

Li P. and Shen S.Q., Two-dimensional gapless spin liquids in frustrated SU(N) quantum magnets, New Journal of Physics. Bristol, IOP Publishing Limited, 2004, 6: 1-13.

Ma X., Hu L., Tao R.B. and Shen S.Q., Influences of spin accumulation on the intrinsic spin Hall effect in two-dimensional electron gases with Rashba spin-orbit coupling, Physical Review B. New York, The American Physical Society, 2004, 70: 195343:1-7.

Ma Z., Li P. and Shen S.Q., Spintronic Faraday rotation spectroscopy and geometrical modulation of spin current in an Aharonov-Casher ring, Physical Review B. New York, The American Physical Society, 2004, 70: 125318:1-7.

Shen S.Q., Invited Talk: Resonant spin Hall effect in two-dimensional electron gas, Inter-Pacific Workshop on Nanoscience and Nanotechnology, Hong Kong. 2004.

Shen S.Q., Invited Talk: Spintronics and spin current, 1st International Conference of Computational and Theoretical Physics and Chemistry, Yantai, China. 2005.

Shen S.Q., Invited talk: Resonant Spin Hall Effect In Two-dimensional Electron Gas, Annual Meeting Of American Physical Society, Los Angels, USA, , March 2003. 2005.

Shen S.Q., Bao Y., Ma M., Xie X.C. and Zhang F.C., Resonant spin Hall conductance in quantum Hall systems lacking bulk and structural inversion symmetry, Physical Review B. New York, The American Physical Society, 2005, 71: 155316:1-8.

Shen S.Q., Spin Hall effect and Berry phase in two-dimensional electron gas, Physical Review B (Rapid Communications). New York, The American Physical Society, 2004, 70: 081311:1-4.

Tong N.H., Shen S.Q. and Bulla R., Charge ordering and phase separation in the infinite dimensional extended Hubbard model, Physical Review B. New York, The American Physical Society, 2004, 70: 085118:1-8.

Zhou B., Shen S.Q. and Liang J.Q., Calculation of tunnel splitting in a biaxial spin particle with an applied magnetic field, European Physical Journal B. EDP Sciences, 2004, 40: 87-92.

Zhou B., Tao R.B. and Shen S.Q., Multiqubit maximally entangled states in the NMR model, Physical Review A. New York, The American Physical Society, 2004, 70: 022311:1-9.

Zhou B., Tao R.B. and Shen S.Q., Quantum-classical crossover for biaxial antiferromagnetic particles with a magnetic field along the hard axis, Physical Review B (Brief Reports). New York, The American Physical Society, 2004, 70: 012409:1-4.

Zhou B., Tao R.B. and Shen S.Q., State evolution and information processing in Mn₁₂ quantum magnet, International Journal of Modern Physics B: Condensed Matter Physics. Singapore, World Scientific, 2004, 18: 2401-2408.

Researcher : Shi S

List of Research Outputs

Li D., Leung Y.H., Djurisic A., Liu Z., Xie M.H., Shi S., Xu S. and Chan W.K., Different origins of visible luminescence in ZnO nanostructures fabricated by the chemical and evaporation methods, Applied Physics Letters. New York, American Institute of Physics, 2004, 85: 1601-1603.

Researcher : Song W

List of Research Outputs

Song W., A real space approach to LEED computation with flexible local mesh refinement. Hong Kong, The University of Hong Kong, 2004, 1-98.

Researcher : Suen WM

List of Research Outputs

Evans E., Iyer S., Schnetter E., Suen W.M., Tao J., Wolfmeyer R. and Zhang H.M., Computational relativistic astrophysics with adaptive mesh refinement: Testbeds, Physical Review D (Rapid Communications). New York, The American Physical Society, 2005, 71: 081301: 1-5.

Researcher : Sun J

List of Research Outputs

Gao J. and Sun J., Josephson junctions with a continually graded barrier, United States Patent. 2004, US 6,818,918 B2.

Gao J. and Sun J., The effective barrier thickness in ramp-type junctions with a continually graded barrier of Y_1-xPr_xBa₂Cu₃O_y, International Journal of Modern Physics B. Singapore, World Scientific, 2005, 19: 383-385.

Zhang P., Wang Z.D., Sun J. and Sun C.P., Holonomic quantum computation using rf superconducting quantum interference devices coupled through a microwave cavity, Physical Review A. New York, The American Physical Society, 2005, 71: 042301:1-5.

Researcher : Sun J

List of Research Outputs

Gao J. and Sun J., Josephson junctions with a continually graded barrier, United States Patent. 2004, US 6,818,918 B2.

Researcher : Sun Q

List of Research Outputs

Sun Q., Wang J. and Guo H., Quantum transport theory for nanostructures with Rashba spin-orbital interaction, Physical Review B. New York, The American Physical Society, 2005, 71: 165310:1-11.

Researcher : Tam PH

List of Research Outputs

Tam P.H., Pun J.C.S., Huang Y.F. and Cheng K.S., Early re-brightenings in GRB afterglows as signatures of low-to-high density boundary, New Astronomy. Amsterdam, Elsevier B.V., 2005, 10: 535-544.

Wang X., Cheng K.S. and Tam P.H., Optical afterglows from cylindrical jets of short gamma-ray bursts, The Astrophysical Journal. The American Astronomical Society, 2005, 621: 894-901.

Researcher : Tam WS

List of Research Outputs

Tam W.S., Pun J.C.S. and Chau H.F., The quality of night sky in Hong Kong, Hong Kong, The University of Hong Kong, 2004, 1-37.

Researcher : Tang APS

List of Research Outputs

Cheng K.S., Harko T.C., Yuan Y.F. and Tang A.P.S., Orbital decay of a binary system consisting of spin-down neutron stars, Astrophysics and Space Science. Netherlands, Kluwer Academic Publishers, 2004, 294: 151-176.

Researcher : To CN

List of Research Outputs

To C.N., Wang H., Djurisic A., Xie M.H., Chan W.K., Xie Z., Wu C. and Tong S.Y., Solvent dependence of the evolution of the surface morphology of thin asymmetric diblock copolymer films, Thin Solid Films. Amsterdam, Elsevier B.V., 2004, 467: 59-65.

Researcher : Tong DSY

List of Research Outputs

Xu S.J., Li G., Xiong S., Tong D.S.Y., Che C.M., Liu W. and Li M.F., Spectral features of LO phonon sidebands in luminescence of free excitons in GaN, The Journal of Chemical Physics. New York, American Institute of Physics, 2005, 122: 244712: 1-5.

Researcher : Tsang WK

List of Research Outputs

Tsang W.K., Determine the atomic structure of a surface with mixed structure phases by using LEED Patterson function. Hong Kong, The University of Hong Kong, 2004, 1-69.

Researcher : Wan L

List of Research Outputs

Wei Y., Wan L., Wang B. and Wang J., Heat current and spin current through a carbon-nanotube-based molecular quantum pump, Physical Review B. New York, The American Physical Society, 2004, 70: 045418:1-9.

Researcher : Wang B

List of Research Outputs

Wei Y., Wan L., Wang B. and Wang J., Heat current and spin current through a carbon-nanotube-based molecular quantum pump, Physical Review B. New York, The American Physical Society, 2004, 70: 045418:1-9.

Researcher : Wang H

List of Research Outputs

To C.N., Wang H., Djurisic A., Xie M.H., Chan W.K., Xie Z., Wu C. and Tong S.Y., Solvent dependence of the evolution of the surface morphology of thin asymmetric diblock copolymer films, Thin Solid Films. Amsterdam, Elsevier B.V., 2004, 467: 59-65.

Wang H., Weng H.M., Ling F.C.C., Ye B.J., Zhou X.Y. and Han R.D., Annealing study of A1/GaSb contact with the use of doppler broadening technique, Acta Physica Polonica A. Poland, The Polish Physical Society, 2005, 107: 874-879.

Researcher : Wang H

List of Research Outputs

Researcher : Wang J

Project Title:	Quantum transport in carbon nanotube based devices
Investigator(s):	Wang J
Department:	Physics
Source(s) of Funding:	Low Budget High Impact Programme
Start Date:	11/2001
Completion Date:	10/2004

Abstract:

To investigate the I-V characteristics and the shot noise spectrum of various molecular devices based on CNT using the first principle calculation; to investigate the photon assisted tunneling through CNT devices using the nonequilibrium Green's function approach; to study the frequency dependent shot noise of CNT devices.

Project Title:	Quantum transport through carbon nanotube based devices
Investigator(s):	Wang J
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	12/2001

Abstract:

To investigate I-V characteigtics and the shot noise spectrum of carbon nanotube based devices; to study photom assisted tunnoling through carbon nanotube based devices; to study electrom pumping for carbon nanotube devices.

Project Title:	First principle study of I-V characteristics of nanoclusters and compound semiconductor nanowires
Investigator(s):	Wang J
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	09/2002

Abstract:

Nanometer electro-mechanical systems (NEMS) technology holds the promise of molecular computing, along with new classes of devices for ultra-sensitive probes and detectors. The project aims at investigating the fundamental properties of NEMS by exploiting a new, powerful and possibly unique simulation tool that can generate ab initio I-V curves self-consistently at a density functional level. The code is suitable for open quantum systems and uses a real-space orbital basis set, and constructs the charge density from non-equilibrium Green's functions. With this code, the research team will explore the transport properties such as the dynamic conductance, electrochemical capacitance, as well as I-V curves of paradigmatic NEMS devices based on nanoclusters.

Project Title:	Theoretical investigation of dynamic response, fluctuations, and charge relaxation in nano-conductors
Investigator(s):	Wang J
Department:	Physics
Source(s) of Funding:	Small Project Funding
Start Date:	11/2002

Abstract:

To develop a general current conserving and gauge invariant transport theory for the nanoscopic systems using the non-equilibrium Green's function approach when the system is driven to far from equilibrium.

Project Title:	First principle calculation of transport properties of hybrid superconducting nanostructures
Investigator(s):	Wang J
Department:	Physics
Source(s) of Funding:	Merit Award for RGC CERG Funded Projects
Start Date:	09/2003

Abstract:

To study DC transport through hybrid superconducting nanostructures; to study AC cument through hybrid superconducting nanostructures; to study the shot noise of hybrid superconducting nanostructures.

Project Title:	First principle calculation of transport properties of hybrid superconducting nanostructures
Investigator(s):	Wang J
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	09/2003

Abstract:

Project Title:	Parametric pumping in nanostructures
Investigator(s):	Wang J
Department:	Physics
Source(s) of Funding:	Small Project Funding
Start Date:	11/2003

Abstract:

To extend the previous parametric electron pumping theory to include the spin polarized pumping effect, and to examine the spin valve effect for the pumped current.

Project Title:	The noise spectrum of spin current
Investigator(s):	Wang J
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	09/2004

Abstract:

To focus on the shot noise of the spin cument generated by various parametric quantum spin pumps such as these pumps with or without the spin flipping mechanism, with or without strong electron and electron interaction; to explore novel ways of generating spin cument in orderto study the correlation of the spin current.

Project Title:	Spin current in nanostructures
Investigator(s):	Wang J
Department:	Physics
Source(s) of Funding:	Small Project Funding
Start Date:	11/2004

Abstract:

To examine the possibility of SFET operation without involving magnetic materials and to exploit such a novel SFET which operates purely on spin current.

Project Title:	The noise spectrum of spin current
Investigator(s):	Wang J
Department:	Physics
Source(s) of Funding:	Merit Award for RGC CERG Funded Projects
Start Date:	01/2005

Abstract:

Refer to hard copy

List of Research Outputs

Chen Z.G., Wang B.G., Xing D.Y. and Wang J., A spin injector, Applied Physics Letters. New York, American Institute of Physics, 2004, 85: 2553-2555.

Lui C.K., Wang B.G. and Wang J., ac transport through a resonant level between ferromagnetic electrodes, Physical Review B. New York, The American Physical Society, 2004, 70: 205316:1-8.

Sun Q., Wang J. and Guo H., Quantum transport theory for nanostructures with Rashba spin-orbital interaction, Physical Review B. New York, The American Physical Society, 2005, 71: 165310:1-11.

Wang B., Xing Y.X., Wan L.H., Wei Y.D. and Wang J., Oscillatory thermopower of carbon chains: First-principles calculations, Physical Review B (Brief Reports). New York, The American Physical Society, 2005, 71: 233406:1-4.

Wang J., Oscillatory Thermopower Of Carbon Chains, The Third International Conference Of Condensed Matter Theory And Materials Calculation, Dalian, P.R. China. 2004.

Wang J., The Conservation Of Spin Current, The Conference Of Quantum Charge Transport And Spin Transport, Beijing, P.R. China. 2005.

Wang J., The Generation Of Spin Current, The First International Workshop On Quantum Manipulation, Shanghai, P.R. China. 2004.

Wang J., The Generation Of Spin Current, The National Conference Of Mesoscopic Physics, Beijing, P.R. China. 2005.

Wei Y., Wan L., Wang B. and Wang J., Heat current and spin current through a carbon-nanotube-based molecular quantum pump, Physical Review B. New York, The American Physical Society, 2004, 70: 045418:1-9.

Wei Y.D., Xu Y., Wang J. and Guo H., Spin-valve effect in a carbon atomic wire, Physical Review B (Brief Reports). New York, The American Physical Society, 2004, 70: 193406:1-4.

Xing Y.X., Wang B., Wei Y.D., Wang B.G. and Wang J., Spin pump in the presence of a superconducting lead, Physical Review B. New York, The American Physical Society, 2004, 70: 245324:1-8.

Zhao H.K. and Wang J., Mesoscopic spin-flip transport through a quantum dot system responded by ac magnetic fields, European Physical Journal B. EDP Sciences, 2005, 44: 93-100.

Zhao H.K. and Wang J., Mesoscopic transport through toroidal carbon nanotubes threaded with a THz magnetic flux, European Physical Journal B. EDP Sciences, 2004, 40: 93-102.

Zhu Y., Maciejko J., Ji T., Guo H. and Wang J., Time-dependent quantum transport: Direct analysis in the time domain, Physical Review B. New York, The American Physical Society, 2005, 71: 075317:1-10.

Researcher : Wang K

List of Research Outputs

Wang K., Wang R., Fung S.H.Y., Beling C.D., Chen X., Huang Y., Li S., Xu S.J. and Gong M., Film thickness degradation of Au/GaN Schottky contact characteristics, Materials Science and Engineering B. Amsterdam, Elsevier B.V., 2005, 117: 21-25.

Researcher : Wang R

List of Research Outputs

Wang K., Wang R., Fung S.H.Y., Beling C.D., Chen X., Huang Y., Li S., Xu S.J. and Gong M., Film thickness degradation of Au/GaN Schottky contact characteristics, Materials Science and Engineering B. Amsterdam, Elsevier B.V., 2005, 117: 21-25.

Wang R., Beling C.D., Fung S.H.Y., Djurisic A., Ling F.C.C., Kwong C.Y. and Li S., Influence of annealing temperature and environment on the properties of indium tin oxide thin films, Journal of Physics D: Applied Physics. Bristol, IOP Publishing Limited, 2005, 38: 2000-2005.

Wang R., Beling C.D., Fung S.H.Y., Djurisic A., Ling F.C.C. and Li S., Influence of gaseous annealing environment on the properties of indium-tin-oxide thin films, Journal of Applied Physics. New York, American Institute of Physics, 2005, 97: 033504:1-5.

Researcher : Wang W

List of Research Outputs

Cheng K.S., Taam R.E. and Wang W., Pulsar wind nebulae and the X-ray emission of nonaccreting neutron stars, The Astrophysical Journal. The American Astronomical Society, 2004, 617: 480-489.

Wang W., Jiang Z. and Cheng K.S., Contribution to diffuse gamma-rays in the Galactic Centre region from unresolved millisecond pulsars, Monthly Notices of the Royal Astronomical Society. London, Royal Astronomical Society, 2005, 358: 263-269.

Wang W., Jiang Z., Pun J.C.S. and Cheng K.S., Possible TeV source candidates among the unidentified EGRET sources, Monthly Notices of the Royal Astronomical Society. London, Royal Astronomical Society, 2005, 360: 646-654.

Researcher : Wang X

List of Research Outputs

Wang X., Cheng K.S. and Tam P.H., Optical afterglows from cylindrical jets of short gamma-ray bursts, The Astrophysical Journal. The American Astronomical Society, 2005, 621: 894-901.

Researcher : Wang Y

List of Research Outputs

Xu S.J., Wang Y., Li Q., Zhang X.H., Liu W. and Chua S.J., Direct observation and theoretical interpretation of strongly enhanced lateral diffusion of photogenerated carriers in InGaN/GaN quantum well structures, Applied Physics Letters. New York, American Institute of Physics, 2005, 86: 071905:1-3.

Researcher : Wang Z

Project Title:	Superconductor science and technology
Investigator(s):	Wang ZD
Department:	Physics
Source(s) of Funding:	Matching Fund for National Key Basic Research Development Scheme (973 Projects)
Start Date:	02/2002

Abstract:

To carry out investigation on superconductor science and technology.

Project Title:	Nonadiabatic geometric phases and their applications in fault-tolerant quantum computation
Investigator(s):	Wang ZD, Duan L.M.
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	07/2002

Abstract:

Quantum computers can solve efficiently significant sets of problems believed to be intractable for classical computers. The current project is to use non-adiabatic geometric operations with fast running speed to realize geometric quantum computation, which may provide a method to overcome the intrinsic difficulty in adiabatic geometric operations associated with the slow gate speed.

Project Title:	Quantum logic gates based on cyclic geometric phases
Investigator(s):	Wang ZD
Department:	Physics
Source(s) of Funding:	Small Project Funding
Start Date:	11/2002

Abstract:

To design a set of quantum logic gates in quantum computing operations with fast running speed based on cyclic geometric phases, which may provide a method to overcome the intrinsic difficulty in adiabatic geometric operations associated with the slow gate speed.

Project Title:	Theoretical studies of impurity and vortex states in high temperature superconductors
Investigator(s):	Wang ZD
Department:	Physics
Source(s) of Funding:	Merit Award for RGC CERG Funded Projects
Start Date:	09/2003

Abstract:

To carry out a systematic and detailed study on the mechanism of IRS in high temperature superconductors(HTS) with particular attention being paid to its magnetic-related origin. It is expected that the study of the variation of IRS with the doping content and accordingly the response of the local moments carried/induced by impurities to the anti-ferromagnetic correlations may help us to clarify the origin of the IRS in HTS; to study theoretically (a) the local electronic structure at vortex cores and the vortex charge in the presence of the orbital AF phase(d-density wave) recently proposed to explain the PG state; and (b) the variation of IRS in response to various spin or charge order parameters by pinning vortices on the imputities as the resonance state is very sensitive to the nature of the electronic structure where the impurity is embedded. In terms of our results, we may be able to understand profoundly some existing experimental results as well as to suggest new experiments to test some predictions.

Project Title:	Theoretical studies of impurity and vortex states in high temperature superconductors
Investigator(s):	Wang ZD
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	09/2003

Abstract:

Project Title:	Vortex state and impurity effect in newly discovered NaCoO superconductors
Investigator(s):	Wang ZD
Department:	Physics
Source(s) of Funding:	Small Project Funding
Start Date:	11/2003

Abstract:

To study theoretically vortex state and impurity effect in the novel superconductors with triangular lattices.

Project Title:	Theoretical Studies of NaCoO Superconductors
Investigator(s):	Wang ZD, Wang Q.H.
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	01/2005

Abstract:

To carry out in-depth theoretical studies on the physical quantities related to the low-lying excitation spectrum of this triangular system with emphasis on the effect of disorder to explain profoundly some existing experimental results as well as to suggest new experiments to test some predictions.

Project Title:	Theoretical Studies of NaCoO Superconductors
Investigator(s):	Wang ZD
Department:	Physics
Source(s) of Funding:	Merit Award for RGC CERG Funded Projects
Start Date:	01/2005

Abstract:

Refer to hard copy

Project Title:	Quantum Entanglement and Quantum Information Processing
Investigator(s):	Wang ZD
Department:	Physics
Source(s) of Funding:	Seed Funding Programme for Basic Research
Start Date:	01/2005

Abstract:

Interest in quantum entanglement and quantum information has increased dramatically in recent years because quantum entanglement plays a crucial role in quantum information processing that could solve efficiently some significant problems believed to be intractable for its classical counterpart. Moreover, quantum entanglement and quantum information processing have found their important applications in scalable solid state systems. So far, several significant progresses have been achieved in this field, including our important work on geometric quantum information processing. Nevertheless, it is both important and timely to elaborate an intrinsic connection between quantum entanglement and quantum phase transition in many-body solid state systems as well as to realize fault-tolerant quantum information processing based on scalable solid-state quantum-bits (qubits), which are two key issues in this interdisciplinary field. In this seed funding project, we shall focus on the following objectives. (1) We plan to work out a reliable and efficient approach to elaborate an intrinsic connection between many-body quantum entanglement and quantum phase transition in many-body low dimensional spin/electron systems, and to find an underline nonlocal nonclassical nature of new quantum orders in these systems. (2) We intend to develop a feasible scheme to implement fault-tolerant quantum information processing with solid state superconducting qubits coupled through a cavity and to address multi-qubit entanglement in this kind of system. (3) We attempt to study how to achieve quantum entanglement for qubits in different nodes and to transfer quantum information among relatively distant qubits. It is expected that several initial but significant results/findings will be obtained with international attentions, enabling us to attract successfully external grants to conduct further in-depth research in the field of quantum entanglement and quantum information.

Project Title:	Interdisciplinary cutting edge research related to condensed matter physics: solid state quantum computing and quantum information processing
Investigator(s):	Wang ZD
Department:	Physics
Source(s) of Funding:	Matching Fund for NSFC Young Researcher Award
Start Date:	03/2005

Abstract:

To study interdisciplinary cutting edge research related to condensed matter physics: solid state quantum computing and quantum information processing.

Researcher : Wang ZD

Project Title:	Superconductor science and technology
Investigator(s):	Wang ZD
Department:	Physics
Source(s) of Funding:	Matching Fund for National Key Basic Research Development Scheme (973 Projects)
Start Date:	02/2002

Abstract:

To carry out investigation on superconductor science and technology.

Project Title:	Nonadiabatic geometric phases and their applications in fault-tolerant quantum computation
Investigator(s):	Wang ZD, Duan L.M.
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	07/2002

Abstract:

Project Title:	Quantum logic gates based on cyclic geometric phases
Investigator(s):	Wang ZD
Department:	Physics
Source(s) of Funding:	Small Project Funding
Start Date:	11/2002

Abstract:

Project Title:	Theoretical studies of impurity and vortex states in high temperature superconductors
Investigator(s):	Wang ZD
Department:	Physics
Source(s) of Funding:	Merit Award for RGC CERG Funded Projects
Start Date:	09/2003

Abstract:

Project Title:	Theoretical studies of impurity and vortex states in high temperature superconductors
Investigator(s):	Wang ZD
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	09/2003

Abstract:

Project Title:	Vortex state and impurity effect in newly discovered NaCoO superconductors
Investigator(s):	Wang ZD
Department:	Physics
Source(s) of Funding:	Small Project Funding
Start Date:	11/2003

Abstract:

To study theoretically vortex state and impurity effect in the novel superconductors with triangular lattices.

Project Title:	Theoretical Studies of NaCoO Superconductors
Investigator(s):	Wang ZD, Wang Q.H.
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	01/2005

Abstract:

Project Title:	Theoretical Studies of NaCoO Superconductors
Investigator(s):	Wang ZD
Department:	Physics
Source(s) of Funding:	Merit Award for RGC CERG Funded Projects
Start Date:	01/2005

Abstract:

Refer to hard copy

Project Title:	Quantum Entanglement and Quantum Information Processing
Investigator(s):	Wang ZD
Department:	Physics
Source(s) of Funding:	Seed Funding Programme for Basic Research
Start Date:	01/2005

Abstract:

Project Title:	Interdisciplinary cutting edge research related to condensed matter physics: solid state quantum computing and quantum information processing
Investigator(s):	Wang ZD
Department:	Physics
Source(s) of Funding:	Matching Fund for NSFC Young Researcher Award
Start Date:	03/2005

Abstract:

To study interdisciplinary cutting edge research related to condensed matter physics: solid state quantum computing and quantum information processing.

List of Research Outputs

Chen H.W., Han Q. and Wang Z.D., Phase diagram of unconventional superconductors on triangular lattices, International Journal of Modern Physics B. Singapore, World Scientific, 2005, 19: 119-121.

Chen Y., Wang Z.D. and Ting C.S., Novel vortex stripe phase under strong magnetic field in high temperature superconductors, International Journal of Modern Physics B. Singapore, World Scientific, 2005, 19: 9-12.

Chik T.W.D., Coombes S. and Wang Z.D., Clustering through postinhibitory rebound in synaptically coupled neurons, Physical Review E. New York, The American Physical Society, 2004, 70: 011908:1-9.

Han Q. and Wang Z.D., Nuclear spin relaxation rate of disordered p_x+ip_y-wave superconductors, Physical Review B. New York, The American Physical Society, 2004, 70: 184504:1-4.

Li J.X. and Wang Z.D., Spin-resonance peak in Na_xCoO₂ • yH₂O superconductors: A probe of the pairing symmetry, Physical Review B (Brief Reports). New York, The American Physical Society, 2004, 70: 212512:1-4.

Lu X.F., Wang Z., Gao H., Shan L., Zhang Y.Z., Lu R.T., Fan L., Yan S.L., Wang Z.D. and Wen H.H., Two-dimensional scaling of resistance in flux flow region in Tl₂Ba₂CaCu₂O₈ thin films, Physica C. Amsterdam, Elsevier B.V., 2004, 415: 139-144.

Wang Z.D., Chang Jiang Scholars (chair-professorship, overseas), China Ministry of Education and Li Ka Shing Foundation. 2005.

Wang Z.D., China Outstanding Young Researcher Fund (Overseas, HK, and Macow ), China Natural Science Foundation. 2005.

Wang Z.D., Geometric Quantum Computation (Invited talk), The 4th World Chinese Physicists Conference, Shanghai. 2004.

Wang Z.D., Quantum Computing Based on Superconducting Qubits (plenary talk), The 8th National Conference on Superconductivity, Shanghai. 2005.

Wang Z.D., Quantum Entanglement and Quantum Phase Transition (Invited Talk), The 4-th Asia-pacific Workshop on Strongly Correlated Systems, Sendai (Japan). 2004.

Wang Z.D., Quantum Information Processing with Superconducting Qubits (Invited talk), Workshop on Solid State Quantum Computation, Hangzhou. 2005.

Wang Z.D., Solid State Quantum Computing (Invited talk), The 1st International Workshop on Frontiers of Theoretical and Computational Physics and Chemistry, Yantai. 2005.

Wang Z.D., Unconventional Geometric quantum computing (Invited talk), The 3rd International Workshop on Condensed Matter Theory and Computational Physics, Dalian. 2004.

Xia T., Han Q., Chen Y., Wang Z.D. and Li X.G., Impurity states in superconducting systems with stripe like modulation, International Journal of Modern Physics B. Singapore, World Scientific, 2005, 19: 267-269.

Zhang P., Wang Z.D., Sun J. and Sun C.P., Holonomic quantum computation using rf superconducting quantum interference devices coupled through a microwave cavity, Physical Review A. New York, The American Physical Society, 2005, 71: 042301:1-5.

Zhang X.D., Zhu S.L., Hu L. and Wang Z.D., Nonadiabatic geometric quantum computation using a single-loop scenario, Physical Review A (Brief Reports). New York, The American Physical Society, 2005, 71: 014302:1-4.

Zhu S.L., Wang Z.D. and Zanardi P., Geometric quantum computation and multiqubit entanglement with superconducting qubits inside a cavity, Physical Review Letters. New York, The American Physical Society, 2005, 94: 100502:1-4.

Researcher : Wei Y

List of Research Outputs

Wei Y., Wan L., Wang B. and Wang J., Heat current and spin current through a carbon-nanotube-based molecular quantum pump, Physical Review B. New York, The American Physical Society, 2004, 70: 045418:1-9.

Researcher : Wei Z

List of Research Outputs

Cheung C.H., Djurisic A., Leung Y.H., Wei Z., Xu S. and Chan W.K., Tris(8-hydroxyquinoline) aluminium nanowires: a simple synthesis method, Chemical Physics Letters. Amsterdam, Elsevier B.V., 2004, 394: 203-206.

Huang Y., Chen X., Fung S.H.Y., Beling C.D., Ling F.C.C., Wei Z., Xu S. and Zhi C., The depth-profiled carrier concentration and scattering mechanism in undoped GaN film grown on sapphire, Journal of Applied Physics. New York, American Institute of Physics, 2004, 96: 1120-1126.

Leung Y.H., Djurisic A., Gao J., Xie M.H., Wei Z., Xu S. and Chan W.K., Zinc oxide ribbon and comb structures: synthesis and optical properties, Chemical Physics Letters. Amsterdam, Elsevier B.V., 2004, 394: 452-457.

Researcher : Weng H

List of Research Outputs

Weng H., Ling F.C.C., Beling C.D., Fung S.H.Y., Cheung C.K., Kwan P.Y.R. and Hui I.P., Tungsten mesh as positron transmission moderator in a monoenergetic positron beam, Nuclear Instruments and Methods in Physics Research B. Amsterdam, Elsevier B.V., 2004, 225: 397-401.

Researcher : Wong HYE

List of Research Outputs

Li X.L., Gao J., Wong H.Y.E. and Mai Z.H., Effect of Eu₂CuO₄/Yttrium-stabilized Z_rO₂ buffer layers on YB₂Cu₃O_7-x thin films grown on Si substrates, Thin Solid Films. Amsterdam, Elsevier B.V., 2005, 489: 200-204.

Researcher : Woo SC

List of Research Outputs

Woo S.C., Physical conditions in the circumstellar gas surrounding supernova 1987A. Hong Kong, The University of Hong Kong, 2005, 1-89.

Researcher : Wu HS

Project Title:	Determine atomic structures with Paterson inversion of LEED-IV curves
Investigator(s):	Wu HS
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	12/2001

Abstract:

To use a global background for all IV curves rather than an individual background for each IV curve that cauese loss of some useful structure information; to use multi-incidence Paterson inversion to replace single-incidence Paterson inversion to significantly reduce the noise; to use two steps to identify true model and obtain the final structure by fitting models to Paterson function.

Project Title:	Reference-selective holographic inversion of LEED spectra: a novel method to determine the final atomic structure model
Investigator(s):	Wu HS
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	12/2002

Abstract:

The goal of this project is to fully explore the advantages of the direct inversions of LEED spectra and to determine the atomic structures of several interesting systems.

Project Title:	Investigation of pure cubic GaN film growth on SiC(0001) substrate
Investigator(s):	Wu HS
Department:	Physics
Source(s) of Funding:	Merit Award for RGC CERG Funded Projects
Start Date:	12/2003

Abstract:

To investigate (1) surface structures of 6H-Sic(0001) surfaces; (2) the interface structures of GaN films/GH SiC(0001); (3) the surface structures of GaN films; (4) the growth condition dependence of the critical thickness of GaN film; (5) the driving force for cubic film growth and inversion from cubic to hexagonal; (6)the possible ways to control the critical thickness of cubic GaN film.

Project Title:	Investigation of pure cubic GaN film growth on SiC(0001) substrate
Investigator(s):	Wu HS
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	12/2003

Abstract:

Project Title:	Surface atomic structure extraction from low energy electron diffraction patterson function
Investigator(s):	Wu HS
Department:	Physics
Source(s) of Funding:	Seed Funding Programme for Basic Research
Start Date:	09/2004

Abstract:

A new method named structure extraction from LEED PF is fully implementing by correctly addressing the two issues; (1) a complex system often has PF spots overlap or missing, which makes structure extraction much harder; (2) real systems often have two domains or even more domains in the surface structure, which also makes structure extraction more complicated.

Project Title:	Surface Atomic structure completion from LEED Patterson Function
Investigator(s):	Wu HS
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	01/2005

Abstract:

To figure out a way to deal with unclear or unseen PF spots; to develop an approach to solve the multi-domain problems; to put the modifications into the existing computer program; to test the completed program with more samples; to apply this new method to number of interesting samples to determine their surface atomic structures.

Project Title:	Surface Atomic structure completion from LEED Patterson Function
Investigator(s):	Wu HS
Department:	Physics
Source(s) of Funding:	Merit Award for RGC CERG Funded Projects
Start Date:	01/2005

Abstract:

Refer to hard copy

List of Research Outputs

Cao Y., Xu S., Lu W., Dai X., Chan Y.F., Wang N., Liu Y., Wu H.S., Xie M.H. and Tong S.Y., In situ revelation of a zinc-blende InN wetting layer during Stranski-Krastanov growth on GaN(0001) by molecular-beam epitaxy, Physical Review B. New York, The American Physical Society, 2005, 71: 155322:1-5.

Liu Y., Xie M.H., Cao Y., Wu H.S. and Tong S.Y., A study of In_xGa_1-xN growth by reflection high-energy electron diffraction, Journal of Applied Physics. New York, American Institute of Physics, 2005, 97: 023502:1-5.

Liu Y., Cao Y., Wu H.S., Xie M.H. and Tong S.Y., Coherent and dislocated three-dimensional islands of In_xGa_1-xN self-assembled on GaN(0001) during molecular-beam epitaxy, Physical Review B (Brief Reports). New York, The American Physical Society, 2005, 71: 153406:1-4.

Researcher : Xia T

List of Research Outputs

Xia T., Han Q., Chen Y., Wang Z.D. and Li X.G., Impurity states in superconducting systems with stripe like modulation, International Journal of Modern Physics B. Singapore, World Scientific, 2005, 19: 267-269.

Researcher : Xie MH

Project Title:	Growth mode and strain relaxation of InGaN grown on GaN
Investigator(s):	Xie MH
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	09/2002

Abstract:

The project aims at studying the growth mode, especially 3-dimensional islanding processes of InGaN grown on GaN by molecular beam epitaxy (MBE). It is designed to explore a wide range of growth parameters and to cover the whole range of In compositions of InGaN. Emphasis will be put on the underlying physics governing the growth mode.

Project Title:	Effect of excess gallium on growth kinetics of GaN
Investigator(s):	Xie MH
Department:	Physics
Source(s) of Funding:	Merit Award for RGC CERG Funded Projects
Start Date:	09/2003

Abstract:

To study the effect of excess Ga on island nucleation kinetrics; to study the effect of excess Ga on step morphology and kinetrics.

Project Title:	Effect of excess gallium on growth kinetics of GaN
Investigator(s):	Xie MH
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	09/2003

Abstract:

To study the effect of excess Ga on island nucleation kinetrics; to study the effect of excess Ga on step morphology and kinetrics.

Project Title:	Structural phase transition of InGaN epi-film during growth on (0001) surface by plasma-assisted molecular-beam epitaxy
Investigator(s):	Xie MH, Wu HS
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	09/2004

Abstract:

To investigate the structural phases of epitaxial InN and GaN films; to examine the possible dependence of crystal structure of the epi-film on the MBE condition; to investigate the physical origin of such a growth phenomenon.

Project Title:	Structural phase transition of InGaN epi-film during growth on (0001) surface by plasma-assisted molecular-beam epitaxy
Investigator(s):	Xie MH
Department:	Physics
Source(s) of Funding:	Merit Award for RGC CERG Funded Projects
Start Date:	01/2005

Abstract:

Refer to hard copy

List of Research Outputs

Cai X., Djurisic A., Xie M.H., Liu H., Zhang X.X., Zhu J.J. and Yang H., Ferromagnetism in Mn and Cr doped GaN by thermal diffusion, Materials Science and Engineering B. Amsterdam, Elsevier B.V., 2005, 117: 292-295.

Cai X., Djurisic A., Xie M.H., Liu H., Zhang X.X., Zhu J.J., Yang H. and Leung Y.H., Magnetic doping and characterization of n-type GaN, AIP Conference Proceedings. New York, American Institute of Physics, 2005, 772: 319-320.

Cai X., Cheng K.W., Oey C.C., Djurisic A., Chan W.K., Xie M.H. and Chui P.C., Porous metallic films fabricated by self-assembly of gold nanoparticles, Thin Solid Films. Amsterdam, Elsevier B.V., 2005, 491: 66-70.

Cao Y., Xu S., Lu W., Dai X., Chan Y.F., Wang N., Liu Y., Wu H.S., Xie M.H. and Tong S.Y., In situ revelation of a zinc-blende InN wetting layer during Stranski-Krastanov growth on GaN(0001) by molecular-beam epitaxy, Physical Review B. New York, The American Physical Society, 2005, 71: 155322:1-5.

Dai X.Q., Ju W.W., Wang G.T. and Xie M.H., First-principles study of indium on silicon (100) – the structure, defects and interdiffusion, Surface Science. Amsterdam, Elsevier B.V., 2004, 572: 77-83.

Djurisic A., Leung Y.H., Liu Z., Li D., Xie M.H., Choy W.C.H. and Cheah K.W., Green photoluminescence in ZnO nanostructures, AIP Conference Proceedings. New York, American Institute of Physics, 2005, 772: 889-890.

Huang Y., Chen X., Fung S.H.Y., Beling C.D., Ling F.C.C., Dai X. and Xie M.H., Current transport property of n-GaN/n-6H-SiC heterojunction: Influence of interface states, Applied Physics Letters. New York, American Institute of Physics, 2005, 86: 122102:1-3.

Kwong C.Y., Djurisic A., Choy W.C.H., Li D., Xie M.H., Chan W.K., Cheah K.W., Lai P.T. and Chui P.C., Efficiency and stability of different tris(8-hydroxyquinoline) aluminium (Alq₃) derivatives in OLED applications, Materials Science and Engineering B. Amsterdam, Elsevier B.V., 2005, 116: 75-81.

Leung Y.H., Djurisic A., Cheung C.H., Xie M.H. and Chan W.K., Growth of N, N'-di(naphthalene-1-yl)-N, N'-diphenyl-benzidine dome structures, Journal of Applied Physics. New York, American Institute of Physics, 2005, 97: 033515:1-5.

Leung Y.H., Djurisic A., Choy W.C.H., Xie M.H., Gao J., Cheah K.W., Man K.K.Y. and Chan W.K., Synthesis and properties of ZnO multipod structures, Journal of Crystal Growth. Amsterdam, Elsevier B.V., 2005, 274: 430-437.

Leung Y.H., Djurisic A. and Xie M.H., Synthesis and properties of ZnO nano-ribbon and comb structures, AIP Conference Proceedings. New York, American Institute of Physics, 2005, 772: 879-880.

Leung Y.H., Djurisic A., Gao J., Xie M.H., Wei Z., Xu S. and Chan W.K., Zinc oxide ribbon and comb structures: synthesis and optical properties, Chemical Physics Letters. Amsterdam, Elsevier B.V., 2004, 394: 452-457.

Leung Y.H., Djurisic A., Xie M.H., Kwong C.Y. and Chan W.K., ZnO nanostructures prepared from ZnO:CNT mixtures, Proceedings of SPIE. Bellingham, SPIE, 2004, 5510: 1-8.

Li D., Leung Y.H., Djurisic A., Liu Z., Xie M.H., Shi S., Xu S. and Chan W.K., Different origins of visible luminescence in ZnO nanostructures fabricated by the chemical and evaporation methods, Applied Physics Letters. New York, American Institute of Physics, 2004, 85: 1601-1603.

Liu Y., Xie M.H., Cao Y., Wu H.S. and Tong S.Y., A study of In_xGa_1-xN growth by reflection high-energy electron diffraction, Journal of Applied Physics. New York, American Institute of Physics, 2005, 97: 023502:1-5.

Liu Y., Cao Y., Wu H.S., Xie M.H. and Tong S.Y., Coherent and dislocated three-dimensional islands of In_xGa_1-xN self-assembled on GaN(0001) during molecular-beam epitaxy, Physical Review B (Brief Reports). New York, The American Physical Society, 2005, 71: 153406:1-4.

To C.N., Wang H., Djurisic A., Xie M.H., Chan W.K., Xie Z., Wu C. and Tong S.Y., Solvent dependence of the evolution of the surface morphology of thin asymmetric diblock copolymer films, Thin Solid Films. Amsterdam, Elsevier B.V., 2004, 467: 59-65.

Researcher : Xiong S

List of Research Outputs

Xu S.J., Li G., Xiong S., Tong D.S.Y., Che C.M., Liu W. and Li M.F., Spectral features of LO phonon sidebands in luminescence of free excitons in GaN, The Journal of Chemical Physics. New York, American Institute of Physics, 2005, 122: 244712: 1-5.

Researcher : Xu H

List of Research Outputs

Li X.L., Li M., Mai Z.H., Gao J. and Xu H., Microstructural studies of YB₂Cu₃O_7-d/Nd₂CuO₄/YB₂Cu₃O_7-d Josephson junctions with a Nd₂CuO₄ buffer layer grown on YSZ substrate, Physica C. Amsterdam, Elsevier B.V., 2004, 416: 69-74.

Researcher : Xu S

Project Title:	Optical properties of individual self-assembled InAs/GaAs Quantum Dots
Investigator(s):	Xu SJ
Department:	Physics
Source(s) of Funding:	Seed Funding Programme for Basic Research
Start Date:	05/2002
Completion Date:	10/2004

Abstract:

To optically probe individual self-assembled InAs/GaAs quantum dots and understand the nature of their optical properties by using advanced electron-beam lithography and near-field scanning optical microscopy/spectroscopy.

Project Title:	Comprehensive spectroscopy investigations of blue and green InGaN/GaN light-emitting diode structures with multi-quantum-wells
Investigator(s):	Xu SJ
Department:	Physics
Source(s) of Funding:	Merit Award for RGC CERG Funded Projects
Start Date:	09/2003

Abstract:

Refer to hard copy

Project Title:	Comprehensive spectroscopy investigations of blue and green InGaN/GaN light-emitting diode structures with multi-quantum-wells
Investigator(s):	Xu SJ
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	09/2003

Abstract:

Refer to hard copy

Project Title:	Optical characterization of cubic phase GaN epilayers grown 6H-SiC substrates
Investigator(s):	Xu SJ, Wu HS
Department:	Physics
Source(s) of Funding:	Seed Funding Programme for Basic Research
Start Date:	04/2004

Abstract:

To investigate optical properties of the cubic phase GaN grown on 6H-SiC. Optical characterization of the available samples and new samples to be grown is major task of the proposed research.

Project Title:	Multiphoton excited photoluminescence and coherent spectra in wide gap semiconductors
Investigator(s):	Xu SJ
Department:	Physics
Source(s) of Funding:	Small Project Funding
Start Date:	11/2004

Abstract:

To investigate two-and three-photon excited photoluminescence and coherent spectra of carriers in ZnO and Gan etc. wide band gap semiconductors.

Project Title:	Optical Properties and Electronic Structures of InGaAs/GaAs Self-Assembled Quantum Dots with High Sheet Density
Investigator(s):	Xu SJ
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	01/2005

Abstract:

To gain understanding of the optical properties and electronic structures of high sheet density InGaAs/GaAs self-assembled quantum dots (QDs) through detailed experimental and theoretical investigations.

Project Title:	Optical Properties and Electronic Structures of InGaAs/GaAs Self-Assembled Quantum Dots with High Sheet Density
Investigator(s):	Xu SJ
Department:	Physics
Source(s) of Funding:	Merit Award for RGC CERG Funded Projects
Start Date:	01/2005

Abstract:

Refer to hard copy

List of Research Outputs

Cao Y., Xu S., Lu W., Dai X., Chan Y.F., Wang N., Liu Y., Wu H.S., Xie M.H. and Tong S.Y., In situ revelation of a zinc-blende InN wetting layer during Stranski-Krastanov growth on GaN(0001) by molecular-beam epitaxy, Physical Review B. New York, The American Physical Society, 2005, 71: 155322:1-5.

Cheung C.H., Djurisic A., Leung Y.H., Wei Z., Xu S. and Chan W.K., Tris(8-hydroxyquinoline) aluminium nanowires: a simple synthesis method, Chemical Physics Letters. Amsterdam, Elsevier B.V., 2004, 394: 203-206.

Huang Y., Chen X., Fung S.H.Y., Beling C.D., Ling F.C.C., Wei Z., Xu S. and Zhi C., The depth-profiled carrier concentration and scattering mechanism in undoped GaN film grown on sapphire, Journal of Applied Physics. New York, American Institute of Physics, 2004, 96: 1120-1126.

Leung Y.H., Djurisic A., Gao J., Xie M.H., Wei Z., Xu S. and Chan W.K., Zinc oxide ribbon and comb structures: synthesis and optical properties, Chemical Physics Letters. Amsterdam, Elsevier B.V., 2004, 394: 452-457.

Li D., Leung Y.H., Djurisic A., Liu Z., Xie M.H., Shi S., Xu S. and Chan W.K., Different origins of visible luminescence in ZnO nanostructures fabricated by the chemical and evaporation methods, Applied Physics Letters. New York, American Institute of Physics, 2004, 85: 1601-1603.

Researcher : Xu S

List of Research Outputs

Researcher : Xu SJ

Project Title:	Optical properties of individual self-assembled InAs/GaAs Quantum Dots
Investigator(s):	Xu SJ
Department:	Physics
Source(s) of Funding:	Seed Funding Programme for Basic Research
Start Date:	05/2002
Completion Date:	10/2004

Abstract:

Project Title:	Comprehensive spectroscopy investigations of blue and green InGaN/GaN light-emitting diode structures with multi-quantum-wells
Investigator(s):	Xu SJ
Department:	Physics
Source(s) of Funding:	Merit Award for RGC CERG Funded Projects
Start Date:	09/2003

Abstract:

Refer to hard copy

Project Title:	Comprehensive spectroscopy investigations of blue and green InGaN/GaN light-emitting diode structures with multi-quantum-wells
Investigator(s):	Xu SJ
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	09/2003

Abstract:

Refer to hard copy

Project Title:	Optical characterization of cubic phase GaN epilayers grown 6H-SiC substrates
Investigator(s):	Xu SJ, Wu HS
Department:	Physics
Source(s) of Funding:	Seed Funding Programme for Basic Research
Start Date:	04/2004

Abstract:

To investigate optical properties of the cubic phase GaN grown on 6H-SiC. Optical characterization of the available samples and new samples to be grown is major task of the proposed research.

Project Title:	Multiphoton excited photoluminescence and coherent spectra in wide gap semiconductors
Investigator(s):	Xu SJ
Department:	Physics
Source(s) of Funding:	Small Project Funding
Start Date:	11/2004

Abstract:

To investigate two-and three-photon excited photoluminescence and coherent spectra of carriers in ZnO and Gan etc. wide band gap semiconductors.

Project Title:	Optical Properties and Electronic Structures of InGaAs/GaAs Self-Assembled Quantum Dots with High Sheet Density
Investigator(s):	Xu SJ
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	01/2005

Abstract:

Project Title:	Optical Properties and Electronic Structures of InGaAs/GaAs Self-Assembled Quantum Dots with High Sheet Density
Investigator(s):	Xu SJ
Department:	Physics
Source(s) of Funding:	Merit Award for RGC CERG Funded Projects
Start Date:	01/2005

Abstract:

Refer to hard copy

List of Research Outputs

Li G.H., Su F.H., Ma B.S., Ding K., Xu S.J. and Chen W., Photoluminescence of doped ZnS nanoparticles under hydrostatic pressure, Physica Status Solidi. B: Basic research. Weinheim, WILEY-VCH Verlag GmbH & Co., 2004, 241: 3248-3256.

Wang K., Wang R., Fung S.H.Y., Beling C.D., Chen X., Huang Y., Li S., Xu S.J. and Gong M., Film thickness degradation of Au/GaN Schottky contact characteristics, Materials Science and Engineering B. Amsterdam, Elsevier B.V., 2005, 117: 21-25.

Xu S.J., Wang Y., Li Q., Zhang X.H., Liu W. and Chua S.J., Direct observation and theoretical interpretation of strongly enhanced lateral diffusion of photogenerated carriers in InGaN/GaN quantum well structures, Applied Physics Letters. New York, American Institute of Physics, 2005, 86: 071905:1-3.

Xu S.J., Li G., Xiong S., Tong D.S.Y., Che C.M., Liu W. and Li M.F., Spectral features of LO phonon sidebands in luminescence of free excitons in GaN, The Journal of Chemical Physics. New York, American Institute of Physics, 2005, 122: 244712: 1-5.

Researcher : Xu Y

List of Research Outputs

Wei Y.D., Xu Y., Wang J. and Guo H., Spin-valve effect in a carbon atomic wire, Physical Review B (Brief Reports). New York, The American Physical Society, 2004, 70: 193406:1-4.

Xu Y., Quantum transport through a C₄₈N₁₂ based nanodevice. Hong Kong, The University of Hong Kong, 2004, 1-63.

Researcher : Xu Y

List of Research Outputs

Wei Y.D., Xu Y., Wang J. and Guo H., Spin-valve effect in a carbon atomic wire, Physical Review B (Brief Reports). New York, The American Physical Society, 2004, 70: 193406:1-4.

Xu Y., Quantum transport through a C₄₈N₁₂ based nanodevice. Hong Kong, The University of Hong Kong, 2004, 1-63.

Researcher : Yip MK

List of Research Outputs

Yip M.K., 下油鍋 -- 不同液體沸點的詭計, 明報, Hong Kong, 明報, 2004, E2.

Yip M.K., 光電效應 -- 日常生活應用廣, 明報, Hong Kong, 明報, 2005, D15.

Researcher : Young CK

List of Research Outputs

Young C.K., Archimedes's iron hand or claw - a new interpretation of an old mystery, Centaurus. Blackwell Pub., 2004, 46: 189-207.

Researcher : Young CKS

List of Research Outputs

Young C.K.S., Total magnitudes of Virgo galaxies - III. Scale errors in the Reference Catalogue of Bright Galaxies T system and light-profile distortion by resolution-degrading and differential-distance effects, Monthly Notices of the Royal Astronomical Society. London, Royal Astronomical Society, 2004, 354: 1011-1019.

Researcher : Zhang F

Project Title:	Superconductor and antiferromagnetic insulator transition in cuprates and layered organic superconductors
Investigator(s):	Zhang FC
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	01/2005

Abstract:

To gain theoretical understanding of a class of superconductors on the verge of antiferromagnetic insulators. The key issue is to investigate the completition between the electron localization due to electron-electron repulsive force and the delocalized paired electrons due to electron's kinetic energy and the attractive force between electrons originated from the antiferromagnetic spin-spin coupling.

Project Title:	Superconductor and antiferromagnetic insulator transition in cuprates and layered organic superconductors
Investigator(s):	Zhang FC
Department:	Physics
Source(s) of Funding:	Merit Award for RGC CERG Funded Projects
Start Date:	01/2005

Abstract:

Refer to hard copy

Researcher : Zhang FC

Project Title:	Superconductor and antiferromagnetic insulator transition in cuprates and layered organic superconductors
Investigator(s):	Zhang FC
Department:	Physics
Source(s) of Funding:	Competitive Earmarked Research Grants (CERG)
Start Date:	01/2005

Abstract:

Project Title:	Superconductor and antiferromagnetic insulator transition in cuprates and layered organic superconductors
Investigator(s):	Zhang FC
Department:	Physics
Source(s) of Funding:	Merit Award for RGC CERG Funded Projects
Start Date:	01/2005

Abstract:

Refer to hard copy

List of Research Outputs

De Silva T.N., Ma M. and Zhang F.C., Dynamically generated dimension reduction and crossover in a spin-orbital model, Physical Review B (Rapid Communications). New York, The American Physical Society, 2004, 70: 100405:1-4.

Gan J.Y., Chen Y., Su Z.B. and Zhang F.C., Gossamer superconductivity near antiferromagnetic Mott insulator in layered organic conductors, Physical Review Letters. New York, The American Physical Society, 2005, 94: 067005:1-4.

Gan J.Y., Zhang F.C. and Su Z.B., Theory of Gossamer and resonating valence bond superconductivity, Physical Review B. New York, The American Physical Society, 2005, 71: 014508:1-9.

Huang H.X., Li Y.Q. and Zhang F.C., Charge-ordered resonating valence bond states in doped cuprates, Physical Review B. New York, The American Physical Society, 2005, 71: 184514:1-6.

Mishra A., Ma M., Zhang F.C., Guertler S., Tang L.H. and Wan S.L., Directional ordering of fluctuations in a two-dimensional compass model, Physical Review Letters. New York, The American Physical Society, 2004, 93: 207201:1-4.

Shen S.Q., Bao Y., Ma M., Xie X.C. and Zhang F.C., Resonant spin Hall conductance in quantum Hall systems lacking bulk and structural inversion symmetry, Physical Review B. New York, The American Physical Society, 2005, 71: 155316:1-8.

Researcher : Zhang P

List of Research Outputs

Zhang P., Wang Z.D., Sun J. and Sun C.P., Holonomic quantum computation using rf superconducting quantum interference devices coupled through a microwave cavity, Physical Review A. New York, The American Physical Society, 2005, 71: 042301:1-5.

Researcher : Zhao HK

List of Research Outputs

Zhao H.K. and Wang J., Mesoscopic spin-flip transport through a quantum dot system responded by ac magnetic fields, European Physical Journal B. EDP Sciences, 2005, 44: 93-100.

Zhao H.K. and Wang J., Mesoscopic transport through toroidal carbon nanotubes threaded with a THz magnetic flux, European Physical Journal B. EDP Sciences, 2004, 40: 93-102.

Researcher : Zhi C

List of Research Outputs

Huang Y., Chen X., Fung S.H.Y., Beling C.D., Ling F.C.C., Wei Z., Xu S. and Zhi C., The depth-profiled carrier concentration and scattering mechanism in undoped GaN film grown on sapphire, Journal of Applied Physics. New York, American Institute of Physics, 2004, 96: 1120-1126.

Researcher : Zhou B

List of Research Outputs

Zhou B., Shen S.Q. and Liang J.Q., Calculation of tunnel splitting in a biaxial spin particle with an applied magnetic field, European Physical Journal B. EDP Sciences, 2004, 40: 87-92.

Zhou B., Tao R.B. and Shen S.Q., Quantum-classical crossover for biaxial antiferromagnetic particles with a magnetic field along the hard axis, Physical Review B (Brief Reports). New York, The American Physical Society, 2004, 70: 012409:1-4.

Zhou B., Tao R.B. and Shen S.Q., State evolution and information processing in Mn₁₂ quantum magnet, International Journal of Modern Physics B: Condensed Matter Physics. Singapore, World Scientific, 2004, 18: 2401-2408.

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