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Planar magnetic texture on the surface of a topological insulator
Zhaochen Liu, Jing Wang, Congjun Wu
We study the planar magnetic textures in an insulating magnetic film coupled to the Dirac surface state of a topological insulator. It is shown that the radial vortex with winding…
Dissipative Edge Transport in Disordered Axion Insulator Films
Zhaochen Liu, Dongheng Qian, Yadong Jiang +1
We investigate the role of disorder in the edge transport of axion insulator films. We predict by first-principles calculations that even-number-layer MnBiTe have gapped he…
Unoccupied Topological Surface State in MnBiTe
Yadong Jiang, Zhaochen Liu, Jing Wang
The unoccupied part of the band structure in the magnetic topological insulator MnBiTe is studied by first-principles calculations. We find a second, unoccupied topological…
Magnetic moiré surface states and flat chern band in topological insulators
Zhaochen Liu, Huan Wang, Jing Wang
We theoretically study the effect of magnetic moiré superlattice on the topological surface states by introducing a continuum model of Dirac electrons with a single Dirac cone movi…
Dynamical magnetoelectric coupling in axion insulator thin films
Zhaochen Liu, Jiang Xiao, Jing Wang
Axion insulator is an exotic magnetic topological insulator with zero Chern number but a nonzero quantized Chern-Simons magnetoelectric coupling. A conclusive experimental evidence…
Intrinsic topological phases in MnBiTe tuned by the layer magnetization
Yue Li, Yadong Jiang, Jinlong Zhang +3
The interplay between band topology and magnetic order could generate a variety of time-reversal-breaking gapped topological phases with exotic topological quantization phenomena,…
Anisotropic topological magnetoelectric effect in axion insulators
Zhaochen Liu, Jing Wang
Three-dimensional topological insulators or axion insulators exhibit the topological magnetoelectric effect, which is isotropic with a universal coefficient of proportionality quan…
Flat Chern Band From Twisted Bilayer MnBiTe
Biao Lian, Zhaochen Liu, Yuanbo Zhang +1
We construct a continuum model for the Moiré superlattice of twisted bilayer MnBiTe, and study the band structure of the bilayer in both ferromagnetic (FM) and antiferromag…
Dynamical axion state with hidden pseudospin Chern numbers in MnBiTe-based heterostructures
Huaiqiang Wang, Dinghui Wang, Zhilong Yang +5
Axion is a hypothetical elementary particle which was initially postulated to solve the charge conjugation-parity problem in particle physics. Interestingly, the axion state has em…
In-Plane Magnetic-Field-Induced Quantum Anomalous Hall Plateau Transition
Jinlong Zhang, Zhaochen Liu, Jing Wang
We study the critical properties of the in-plane magnetic field-induced quantum anomalous Hall (QAH) plateau transition in axion insulators. Take even septuple layer film MnBiT…
Large dynamical axion field in topological antiferromagnetic insulator MnBiTe
Jinlong Zhang, Dinghui Wang, Minji Shi +3
The dynamical axion field is a new state of quantum matter where the magnetoelectric response couples strongly to its low-energy magnetic fluctuations. It is fundamentally differen…
Distribution of Conductances in Chiral Topological Superconductor Junctions
Biao Lian, Jing Wang
We study the electronic transport of heterojunctions made of chiral topological superconductors (TSCs) with chiral Majorana fermion modes and quantum Hall insulators (QHIs) wit…
Multiple Chiral Majorana Fermion Modes and Quantum Transport
Jing Wang, Biao Lian
We propose a general recipe for chiral topological superconductor (TSC) in two dimensions with multiple chiral Majorana fermion modes from a quantied anomalous Hall insulator i…
Controllable Majorana fermions on domain walls of a magnetic topological insulator
Jing Wang
We propose to realize a one-dimensional chiral topological superconducting state at the magnetic domain walls stripe of a magnetic topological insulator coupled with a conventional…
Quantum phase transition of chiral Majorana fermion in the presence of disorder
Biao Lian, Jing Wang, Xiao-Qi Sun +2
We study the quantum phase transitions of a disordered two-dimensional quantum anomalous Hall insulator with -wave superconducting proximity, which are governed by the percolati…
Antiferromagnetic Topological Nodal Line Semimetals
Jing Wang
We study three-dimensional nodal line semimetals (NLSMs) with magnetic ordering and strong spin-orbit interaction. Two distinct classes of magnetic NLSMs are proposed. The first cl…
Generation of Spin Currents by Magnetic Field in - and -Broken Materials
Jing Wang, Biao Lian, Shou-Cheng Zhang
Pure spin currents carry information in quantum spintronics and could play an essential role in the next generation low-energy-consumption electronics. Here we theoretically predic…
Dynamical Axion Field in a Magnetic Topological Insulator Superlattice
Jing Wang, Biao Lian, Shou-Cheng Zhang
We propose that the dynamical axion field can be realized in a magnetic topological insulator superlattice or a topological paramagnetic insulator. The magnetic fluctuations of the…
Edge State Induced Andreev Oscillation in Quantum Anomalous Hall Insulator-Superconductor Junctions
Biao Lian, Jing Wang, Shou-Cheng Zhang
We study the quantum Andreev oscillation induced by interference of the edge chiral Majorana fermions in junctions made of quantum anomalous Hall (QAH) insulators and superconducto…
Quantized topological magnetoelectric effect of the zero-plateau quantum anomalous Hall state
Jing Wang, Biao Lian, Xiao-Liang Qi +1
Topological magnetoelectric effect in a three-dimensional topological insulator is a novel phenomenon, where an electric field induces a magnetic field in the same direction, with…
Resonant magneto-optic Kerr effect in the magnetic topological insulator Cr:(Sb,Bi)Te
Shreyas Patankar, J. P. Hinton, Joel Griesmar +10
We report measurements of the polar Kerr effect, proportional to the out-of-plane component of the magnetization, in thin films of the magnetically doped topological insulator $(\t…
Metal-to-Insulator Switching in Quantum Anomalous Hall States
Xufeng Kou, Lei Pan, Jing Wang +8
After decades of searching for the dissipationless transport in the absence of any external magnetic field, quantum anomalous Hall effect (QAHE) was recently achieved in magnetic t…
Electrically Tunable Magnetism in Magnetic Topological Insulators
Jing Wang, Biao Lian, Shou-Cheng Zhang
The external controllability of the magnetic properties in topological insulators would be important both for fundamental and practical interests. Here we predict the electric-fiel…
Quantum Anomalous Hall Effect in Magnetic Insulator Heterostructure
Gang Xu, Jing Wang, Claudia Felser +2
Based on ab initio calculations, we predict that a monolayer of Cr-doped (Bi,Sb)2Te3 and GdI2 heterostructure is a quantum anomalous Hall insulator with a non-trivial band gap up t…