236 citations · 1.5k across the 46 of their papers we have counts for
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Non-Hermitian Topology from Edge Transport in Hermitian Quantum Anomalous Hall Systems
Humian Zhou, Ming Lu, Chui-Zhen Chen +1
Non-Hermitian physics, known for exotic phenomena like exceptional points and the skin effect, has been most prominently realized in engineered systems relying on controlled gain a…
Robust Spin Logic Enabled by Generalized Symmetry in -Wave Magnets
Hao-Kun Ke, Gong Zhao, Siqing Li +2
Unconventional magnets combine the vanishing stray fields of antiferromagnets with the strong spin-splitting of ferromagnets, offering a unique material platform for spintronics. H…
Interplay between electronic dephasing and localization in finite-sized Chern insulator
Yunhe Bai, Yuanzhao Li, Jianli Luan +14
Anderson localization is anticipated to play a pivotal role in the manifestation of the quantum anomalous Hall effect, akin to its role in conventional quantum Hall effects. The si…
Interlayer Exchange Coupling-Induced Critical-Metal-to-Insulator Phase Transition in Quantum Anomalous Hall Insulators
Ruoxi Zhang, Yi-Fan Zhao, Ling-Jie Zhou +6
Interlayer exchange coupling (IEC) between two magnetic layers sandwiched by a nonmagnetic spacer layer plays a critical role in shaping the magnetic properties of such heterostruc…
Reentrant quantum anomalous Hall effect in molecular beam epitaxy-grown MnBi2Te4 thin films
Yuanzhao Li, Yunhe Bai, Yang Feng +16
In this study, we investigate intrinsic magnetic topological insulator MnBi2Te4 thin films grown by molecular beam epitaxy. We observe a reentrant quantum anomalous Hall effect whe…
Engineering Plateau Phase Transition in Quantum Anomalous Hall Multilayers
Deyi Zhuo, Ling-Jie Zhou, Yi-Fan Zhao +7
The plateau phase transition in quantum anomalous Hall (QAH) insulators corresponds to a quantum state wherein a single magnetic domain gives way to multiple magnetic domains and t…
Anomalous Fraunhofer-like patterns in quantum anomalous Hall Josephson junction
Junjie Qi, Haiwen Liu, Jie Liu +5
The intriguing interplay between topology and superconductivity has attracted significant attention, given its potential for realizing topological superconductivity. In the quantum…
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…
Majorana corner modes and flat-band Majorana edge modes in superconductor/topological-insulator/superconductor junctions
Xiao-Ting Chen, Chun-Hui Liu, Dong-Hui Xu +1
Recently, superconductors with higher-order topology have stimulated extensive attention and research interest. Higher-order topological superconductors exhibit unconventional bulk…
Quantum Anomalous Layer Hall Effect in the Topological Magnet MnBi2Te4
Wen-Bo Dai, Hailong Li, Dong-Hui Xu +2
Recently, a type of Hall effect due to an unusual layer-locked Berry curvature called the layer Hall effect (LHE) has been reported in the even-layered two-dimensional antiferromag…
Half-Quantized Helical Hinge Currents in Axion Insulators
Ming Gong, Haiwen Liu, Hua Jiang +2
We propose that half-quantized helical hinge currents manifest as the fingerprint of the axion insulator (AI). These helical hinge currents microscopically originate from the later…
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…
Edge states in a non-Hermitian topological crystalline insulator
Qiu-Yue Xu, Feng Liu, Chui-Zhen Chen +1
Breaking Hermiticity in topological systems gives rise to intriguing phenomena, such as the exceptional topology and the non-Hermitian skin effect. In this work, we study a non-Her…
Coexisting of Quantum Hall and Quantum Anomalous Hall phases in Disordered
Hailong Li, Chui-Zhen Chen, Hua Jiang +1
In most cases, to observe quantized Hall plateaux, an external magnetic field is applied in intrinsic magnetic topological insulators . Nevertheless, whether t…
Direct visualization of edge state in even-layer MnBi2Te4 at zero magnetic field
Weiyan Lin, Yang Feng, Yongchao Wang +12
Being the first intrinsic antiferromagnetic(AFM) topological insulator(TI), MnBi2Te4 is argued to be a topological axion state in its even-layer form due to the antiparallel magnet…
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…
Topological excitonic corner states and nodal phase in bilayer quantum spin Hall insulators
Zheng-Rong Liu, Lun-Hui Hu, Chui-Zhen Chen +2
Interaction induced topological states remain one of the fascinating phases in condensed matter physics. The exciton condensate has recently sparked renewed interest due to the dis…
Critical Behavior and Universal Signature of an Axion Insulator State
Hailong Li, Hua Jiang, Chui-Zhen Chen +1
Recently, the search for an axion insulator state in the ferromagnet-3D topological insulator (TI) heterostructure and has attracted intensive interest. Howev…
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…
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…
Evidence of Higher Order Topology in Multilayer WTe from Josephson Coupling through Anisotropic Hinge States
Yong-Bin Choi, Yingming Xie, Chui-Zhen Chen +12
The noncentrosymmetric Td-WTe, previously known as a type-II Weyl semimetal, is expected to have higher order topological phases with topologically protected, helical one-dimen…
Scaling Behavior of the Quantum Phase Transition from a Quantum Anomalous Hall Insulator to an Axion Insulator
Xinyu Wu, Di Xiao, Chui-Zhen Chen +7
The phase transitions from one plateau to the next plateau or to an insulator in quantum Hall and quantum anomalous Hall (QAH) systems have revealed universal scaling behaviors. A…
Emergent Topological Invariant and Robust Helical Edge States in Two-Dimensional Topological Metals
Chui-Zhen Chen, Hua Jiang, Dong-Hui Xu +1
In this work, we study the disorder effect on topological metals that support a pair of helical edge modes deeply embedded inside the gapless bulk states. Strikingly, we predict th…
Higher-Order Topological Insulators in Quasicrystals
Rui Chen, Chui-Zhen Chen, Jin-Hua Gao +2
Current understanding of higher-order topological insulators (HOTIs) is based primarily on crystalline materials. Here, we propose that HOTIs can be realized in quasicrystals. Spec…