Broken time-reversal symmetry in Josephson junction involving two-band superconductors (2008)
A novel time-reversal symmetry breaking state is found theoretically in the Josephson junction between the two-gap superconductor and the conventional s-wave superconductor. This occurs due to the...
Quantum coherence and Kondo effect in multi quantum dot systems (2004)
The quantum interference effect among coupled identical quantum dots is studied in the present paper in the limit of strong intra-dot Coulomb interaction. When the average electron number in each dot...
Some Experimental Signatures to look for Time-reversal Violating superconductors (2004)
We discuss some experimental signatures associated with the topological structures of unconventional superconductor order parameters of form $d_{x^2-y^2}+ix$, where $x=s,p_x \pm p_y$, or $d_{xy}$....
Loke, W. K., Yoon, S. F., Ng, T. K., Wang, S. Z., Fan, W. J.
Rapid thermal annealing (RTA) of 1000A GaNAs films grown on (100) oriented GaAs substrate by radio frequency (RF) plasma assisted solid-source molecular beam epitaxy was studied by low-temperature...
Ferroelectrics with Low-energy Electronic Excitations (2001)
We formulate a general theory of the dielectric response of a lattice with a structural transition and a polarization instability due to a soft-optic mode coupled to low energy electronic excitations...
Re-examination of electronic transports through a quantum wire coupled to a quantum dot (1999)
In this paper we re-examine the problem of electronic transports through a system consisting of a quantum dot which has well-defined discrete energy levels connected to an infinite quantum wire,...
Supersymmetric Mean-Field Theory of t-J Model (1999)
The supersymmetric formulation of t-J model is studied in this paper at the mean-field level where $\delta$-T phase diagram is computed. We find that slave-fermion-like spiral phase is stable at low...
A model of marginal Fermi liquid superconductor at two dimensions (1999)
In this paper we study a model of s-wave marginal Fermi liquid superconductor at two dimensions. Besides the usual Bardeen-Cooper-Schrieffer(BCS) point attractive interaction, the fermions in our...
Bosonization theory of fermions interacting via a confining potential (1999)
We study in this paper the properties of a gas of fermions interacting {\em via} a scalar potential $v(q)=4\pi{e}^2/q^2$ for $q
Supersymmetry in models with strong on-site Coulomb repulsion - application to t-J model (1998)
A supersymmetric way of imposing the constraint of no double occupancy in models with strong on-site Coulomb repulsion is presented in this paper. In this formulation the physical operators in the...
Tilting instability and other anomalies in the flux-lattice in some magnetic superconductors (1997)
The flux-line lattice in the compound $ErNi_2B_2C$, which has a tendency to ferromagnetic order in the a-b plane is studied with external magnetic field direction close to the c-axis. We show the...
Spontaneous vortex phase discovered? (1996)
It is argued that a spontaneous vortex phase may exist in the recently discovered compound $ErNi_2B_2C$ at temperature below 2.3K. The consequences of this proposal are discussed. In particular the...
Detection of RTX Toxin Gene in Vibrio cholerae by PCR
Chow, K. H., Ng, T. K., Yuen, K. Y., Yam, W. C.
A PCR that amplifies a recently discovered Vibrio cholerae RTX (repeat in toxin) toxin gene was developed. Among 166 clinical and environmental isolates of V. cholerae causing epidemics and sporadic...
Clostridium thermohydrosulfuricum consumed glucose in preference to cellobiose as an energy source for growth. The rates of substrate uptake in glucose- and cellobiose-grown cell suspensions were 45...
An endoglucanase (1,4-beta-D-glucan glucanohydrolase, EC 3.2.1.4) was purified from Clostridium thermocellum by procedures that included centrifugation, ultrafiltration, selective precipitation,...
Contemporary Methicillin-Resistant Staphylococcus aureus Clones in Hong Kong
Ip, Margaret, Yung, R. W. H., Ng, T. K., Luk, W. K., Tse, Cindy, Hung, Philip, ...
Two hundred nonduplicate methicillin-resistant Staphylococcus aureus (MRSA) isolates causing bacteremia in patients in four major Hong Kong hospitals during the period 2000 to 2001 were characterized...
Detection of RTX Toxin Gene in Vibrio cholerae by PCR
Chow, K. H., Ng, T. K., Yuen, K. Y., Yam, W. C.
A PCR that amplifies a recently discovered Vibrio cholerae RTX (repeat in toxin) toxin gene was developed. Among 166 clinical and environmental isolates of V. cholerae causing epidemics and sporadic...
Clostridium thermohydrosulfuricum consumed glucose in preference to cellobiose as an energy source for growth. The rates of substrate uptake in glucose- and cellobiose-grown cell suspensions were 45...
An endoglucanase (1,4-beta-D-glucan glucanohydrolase, EC 3.2.1.4) was purified from Clostridium thermocellum by procedures that included centrifugation, ultrafiltration, selective precipitation,...
Contemporary Methicillin-Resistant Staphylococcus aureus Clones in Hong Kong
Ip, Margaret, Yung, R. W. H., Ng, T. K., Luk, W. K., Tse, Cindy, Hung, Philip, ...
Two hundred nonduplicate methicillin-resistant Staphylococcus aureus (MRSA) isolates causing bacteremia in patients in four major Hong Kong hospitals during the period 2000 to 2001 were characterized...