662 citations · 3.7k across the 108 of their papers we have counts for
8 papers · 1 filter
Quantum Hall effect in ac driven graphene: from half-integer to integer case
Kai-He Ding, Lih-King Lim, Gang Su +1
We theoretically study the quantum Hall effect (QHE) in graphene with an ac electric field. Based on the tight-binding model, the structure of the half-integer Hall plateaus at $σ_…
Quantum Spin Hall Effect and Topologically Invariant Chern Numbers
D. N. Sheng, Z. Y. Weng, L. Sheng +1
We present a topological description of quantum spin Hall effect (QSHE) in a two-dimensional electron system on honeycomb lattice with both intrinsic and Rashba spin-orbit coupling…
Quantum Hall Effect of Dirac Fermions in Graphene: Disorder Effect and Phase Diagram
D. N. Sheng, L. Sheng, Z. Y. Weng
We numerically study the interplay of band structure, topological invariant and disorder effect in two-dimensional electron system of graphene in a magnetic field. Two \emph{distin…
Numerical Study of the Spin Hall Conductance in the Luttinger Model
W. Q. Chen, Z. Y. Weng, D. N. Sheng
We present first numerical studies of the disorder effect on the recently proposed intrinsic spin Hall conductance in a three dimensional (3D) lattice Luttinger model. The results…
Quantum Hall effect at weak magnetic field: New float-up picture
D. N. Sheng, Z. Y. Weng, X. G. Wen
The fate of integer quantum Hall effect (IQHE) at weak magnetic field is studied numerically in the presence of {\it correlated} disorders. We find a systematic {\it float-up} and…
Phase Diagram of Integer Quantum Hall Effect
D. N. Sheng, Z. Y. Weng
The phase diagram of integer quantum Hall effect is numerically determined in the tight-binding model, which can account for overall features of recently obtained experimental phas…
Reflection Symmetry and Quantized Hall Resistivity near Quantum Hall Transition
D. N. Sheng, Z. Y. Weng
We present a direct numerical evidence for reflection symmetry of longitudinal resistivity and quantized Hall resistivity near the transition between quantu…
New universality of metal-insulator transition in integer quantum Hall effect system
D. N. Sheng, Z. Y. Weng
A new universality of metal-insulator transition in integer quantum Hall effect (IQHE) system is studied based on a lattice model, where the IQHE states only exist within a finite…