29 citations · 91 across the 7 of their papers we have counts for
6 papers · 1 filter
Generalized Falicov-Kimball Models
Xiao-Hui Li, Zewei Chen, Tai-Kai Ng
In this paper we extend the Falicov-Kimball model (FKM) to the case where the "quasi-particles" entering the FKM are not "ordinary" fermions. As an example we first discuss how the…
Interaction induced edge states in HgTe/CdTe Quantum Well under magnetic field
Zewei Chen, Tai Kai Ng
In this paper, we study doped HgTe/CdTe quantum well with Hubbard-type interaction under perpendicular magnetic field using a lattice Bernevig-Hughes-Zhang (BHZ) model with a bulk…
An exactly solvable BCS-Hubbard Model in arbitrary dimensions
Zewei Chen, Xiaohui Li, Tai Kai Ng
We introduce in this paper an exact solvable BCS-Hubbard model in arbitrary dimensions. The model describes a p-wave BCS superconductor with equal spin pairing moving on a bipartit…
Magnetic properties of 2D topological insulators
Zewei Chen, Tai Kai Ng
The effects of Hubbard-type on-site interactions on the BHZ model is studied in this paper for model parameters appropriate for the HgTe/CdTe quantum well. Within a simple mean fie…
Thermodynamics of Ising Spins on the Star Lattice
Zewei Chen, Nvsen Ma, Dao-Xin Yao
There is a new class of two-dimensional magnetic materials polymeric iron (III) acetate fabricated recently in which Fe ions form a star lattice. We study the thermodynamics of Isi…
Spin transport in the Neel and collinear antiferromagnetic phase of the two dimensional spatial and spin anisotropic Heisenberg model on a square lattice
Zewei Chen, Trinanjan Datta, Dao-Xin Yao
We analyze and compare the effect of spatial and spin anisotropy on spin conductivity in a two dimensional S=1/2 Heisenberg quantum magnet on a square lattice. We explore the model…