180 citations · 2.5k across the 74 of their papers we have counts for
46 papers · 1 filter
Dissipative Chiral Channels, Ohmic Scaling and Half-integer Hall Conductivity from the Relativistic Quantum Hall Effect
Humian Zhou, Chui-Zhen Chen, Qing-Feng Sun +1
The quantum Hall effect (QHE), which was observed in 2D electron gas under an external magnetic field, stands out as one of the most remarkable transport phenomena in condensed mat…
Transport Theory of Half-quantized Hall Conductance in a Semi-magnetic Topological Insulator
Humian Zhou, Hailong Li, Dong-Hui Xu +3
Recently,a half-quantized Hall conductance (HQHC) plateau is experimentally observed in a semi-magnetic topological insulator heterostructure. However,the heterostructure is metall…
Evolution with Magnetic Field of Discrete Scale Invariant Supercritical States in Graphene
Hailong Li, Haiwen Liu, Robert Joynt +1
We investigate the quasi-bound states of a Coulomb impurity in graphene in the presence of a magnetic field. \ These states exhibit the dramatic and rather rare property of discret…
Multi-orbital model reveals second-order topological insulator in 1H-transition metal dichalcogenide
Jiang Zeng, Haiwen Liu, Hua Jiang +2
Recently, a new class of second-order topological insulators (SOTIs) characterized by an electronic dipole has been theoretically introduced and proposed to host topological corner…
Quantum Hall effect originated from helical edge states in CdAs
Rui Chen, C. M. Wang, Tianyu Liu +2
The recent experimental observations of the quantum Hall effect in 3D topological semimetals have attracted great attention, but there are still debates on its origin. We systemati…
Evolution of Berry curvature and reentrant quantum anomalous Hall effect in an intrinsic magnetic topological insulator
Chui-Zhen Chen, Junjie Qi, Dong-Hui Xu +1
Recently, the magnetic topological insulator MnBiTe emerged as a competitive platform to realize quantum anomalous Hall (QAH) states. We report a Berry-curvature splitting…
Analytical solution for the surface states of antiferromagnetic topological insulator MnBiTe
Hai-Peng Sun, C. M. Wang, Song-Bo Zhang +7
Recently, the intrinsic magnetic topological insulator MnBiTe has attracted great attention. It has an out-of-plane antiferromagnetic order, which is believed to open a siz…
Chiral Interface States and Related Quantized Transport in Disordered Chern Insulators
Zhi-Qiang Zhang, Chui-Zhen Chen, Yijia Wu +4
In this Letter, we study an Anderson-localization-induced quantized transport in disordered Chern insulators (CIs). By investigating the disordered CIs with a step potential, we fi…
Finite-thickness effect and spin polarization of the even-denominator fractional quantum Hall states
Pengjie Wang, Jian Sun, Hailong Fu +6
The spin-polarized even-denominator fractional quantum Hall (FQH) states in the second Landau level (LL), i.e. 5/2 and 7/2, may possess novel quasi-particle excitations obeying non…
Transport study of the wormhole effect in three-dimensional topological insulators
Ming Gong, Ming Lu, Haiwen Liu +3
Inside a three-dimensional strong topological insulator, a tube with magnetic flux carries a pair of protected one-dimensional linear fermionic modes. This phenomenon is kno…
Using nonlocal surface transport to identify the axion insulator
Rui Chen, Shuai Li, Hai-Peng Sun +4
The axion is a hypothetical but experimentally undetected particle. Recently, the antiferromagnetic topological insulator MnBiTe has been predicted to host the axion insula…
Hinged Quantum Spin-Hall Effect in Antiferromagnetic Topological Insulators
Yue-Ran Ding, Dong-Hui Xu, Chui-Zhen Chen +1
In this work, we predict a hinged quantum spin-Hall (HQSH) effect featured by a pair of helical hinge modes in antiferromagnetic (AFM) topological insulator (TI) multilayers. This…
Majorana zero modes by engineering topological kink states in two dimensional electron gas
Shu-guang Cheng, Jie Liu, Haiwen Liu +3
Majorana zero modes (MZMs)--bearing potential applications for topological quantum computing--are verified in quasi-one-dimensional (1D) Fermion systems, including semiconductor na…
Manipulation and Characterization of the Valley Polarized Topological Kink States in Graphene Based Interferometers
Shu-guang Cheng, Haiwen Liu, Hua Jiang +2
Valley polarized topological kink states, existing broadly in the domain wall of hexagonal lattices systems, are identified in experiments, unfortunately, only very limited physica…
Magnetic Flux Control of Chiral Majorana Edge Modes in Topological Superconductor
Yan-Feng Zhou, Zhe Hou, Peng Lv +2
We study the transport of chiral Majorana edge modes (CMEMs) in a hybrid quantum anomalous Hall insulator-topological superconductor (QAHI-TSC) system in which the TSC region conta…
Noise signatures for determining chiral Majorana fermion modes
Yu-Hang Li, Jie Liu, Haiwen Liu +3
The conductance measurement of a half quantized plateau in a quantum anomalous Hall insulator-superconductor structure is reported by a recent experiment [Q. L. He \textit{et al.},…
Doubled Shapiro Steps in a Topological Josephson Junction
Yu-Hang Li, Jie Liu, Juntao Song +3
We study the transport properties of a superconductor-quantum spin Hall insulator-superconductor (S-QSHI-S) hybrid system in the presence of a microwave radiation. Instead of adiab…
Stability of the bubble states in Corbino geometry under a tilted field
Pengjie Wang, Yijia Wu, Hua Chen +6
We measured the activation energy gap of the N = 2 bubble states using tilted-field technique in two GaAs/AlGaAs samples with Corbino geometry, and observed monotonically decreasin…
Two-Dimensional Lattice Model for the Surface States of Topological Insulators
Yan-Feng Zhou, Hua Jiang, X. C. Xie +1
The surface states in three-dimensional (3D) topological insulators (TIs) can be described by a two-dimensional (2D) continuous Dirac Hamiltonian. However, there exists the Fermion…
Effect of magnetic field on a magnetic topological insulator film with structural inversion asymmetry
Shu-feng Zhang, Hua Jiang, X. C. Xie +1
The effect of magnetic field on an ultrathin magnetic topological insulator film with structural inversion asymmetry is investigated. We introduce the phase diagram, calculate the…
Interference Effect of Majorana Fermions in a Spin-orbit Coupled Superconducting Wire
Jie Liu, Juntao Song, Qing-Feng Sun +1
Two majorana Fermions (MFs) localized at the two ends of the topological superconducting wire can interfere with each other and form the well known Josephson current. We revea…
Disorder and metal-insulator transitions in Weyl semimetals
Chui-Zhen Chen, Juntao Song, Hua Jiang +3
The Weyl semimetal (WSM) is a newly proposed quantum state of matter. It has Weyl nodes in bulk excitations and Fermi arcs surface states. We study the effects of disorder and loca…
Tunable Anderson metal-insulator transition in quantum-spin Hall insulators
Chui-Zhen Chen, Haiwen Liu, Hua Jiang +3
We numerically study disorder effects in Bernevig-Hughes-Zhang (BHZ) model, and find that Anderson transition of quantum spin-Hall insulator (QSHI) is determined by model parameter…
Spin-current diode with a ferromagnetic semiconductor
Qing-Feng Sun, X. C. Xie
Diode is a key device in electronics: the charge current can flow through the device under a forward bias, while almost no current flows under a reverse bias. Here we propose a cor…