318 citations · 1k across the 37 of their papers we have counts for
11 papers · 1 filter
Quasicrystalline Chern Insulators
Ai-Lei He, Lu-Rong Ding, Yuan Zhou +2
Chern insulator or quantum anomalous Hall state is a topological state with integer Hall conductivity but in absence of Landau level. It had been well established on various two-di…
Chern Insulators on Singular Geometries
Ai-Lei He, Wei-Wei Luo, Yi-Fei Wang +1
Topological quantum states have been proposed and investigated on two-dimensional flat surfaces or lattices with different geometries like the plane, cylinder and torus. Here, we s…
Characterizations of topological superconductors: Chern numbers, edge states and Majorana zero modes
Xiao-Ping Liu, Yuan Zhou, Yi-Fei Wang +1
The topological properties in topological superconductors are usually characterized by the bulk Chern numbers, edge-state spectra, and Majorana zero modes. Whether they are equival…
Width-tuned magnetic order oscillation on zigzag edges of honeycomb nanoribbons
Wen-Chao Chen, Yuan Zhou, Shun-Li Yu +2
Quantum confinement and interference often generate exotic properties in nanostructures. One recent highlight is the experimental indication of a magnetic phase transition in zigza…
Transversal Propagation Behaviors of Helical Edge States In a QSH System
Feng Lu, Yuan Zhou, Jin An +1
The transversal propagation of the edge states in a two-dimensional quantum spin Hall system are classified by decay characteristic quantity . Two different modes of the helical…
Quantized multi-terminal resistances in ferromagnetic graphene p-n junctions
Lei Xu, Jin An, Chang-De Gong
The quantum Hall and longitudinal resistances in multi-terminal ferromagnetic graphene p-n junctions under a perpendicular magnetic field are investigated. In the Hall measurements…
Zigzag graphene nanoribbons without inversion symmetry
Lihua Pan, Jin An, Yong-Jun Liu +1
Graphene on a substrate will suffer an inversion-symmetry-breaking (ISB) lattice potential. Taking electron-electron interaction into account, we study in this paper the possibilit…
Induced chiral Dirac fermions in graphene by a periodically modulated magnetic field
Lei Xu, Jin An, Chang-De Gong
The effect of a modulated magnetic field on the electronic structure of neutral graphene is examined in this paper. It is found that application of a small staggered modulated magn…
Topological-Fermi-Liquid to Quantum-Hall-Liquid Transitions: -Band and -Band Fermions in a Magnetic Field
Yi-Fei Wang, Chang-De Gong
We find that in a multi-orbital system with intraorbital and interorbital hopping integrals, the Hall conductance exhibits various topological quantum phase transitions (QPTs) indu…
Four-Step Evolution of Spin-Hall Conductance: Tight-Binding Electrons with Rashba Coupling in a Magnetic Field
Yi-Fei Wang, Yang Zhao, Chang-De Gong
An intriguing magneto-transport property is demonstrated by tight-binding lattice electrons with Rashba spin-orbit coupling (SOC) in a magnetic field. With the flux strength $ϕ={2π…
Redistributing Chern numbers of Landau subbands: tight-binding electrons under staggered-modulated magnetic fields
Yi-Fei Wang, Chang-De Gong
We investigate the magneto-transport properties of electrons on a square lattice under a magnetic field with the alternate flux strength in neighboring plaquettes. A new p…