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10 papers · 2 filters
Observation of quadratic Weyl points and double-helicoid arcs
Hailong He, Chunyin Qiu, Xiangxi Cai +4
Very recently, novel quasiparticles beyond those mimicking the elementary high-energy particles such as Dirac and Weyl fermions have attracted great interest in condensed matter ph…
Non-Hermitian topological phase transitions for quantum spin Hall insulators
Junpeng Hou, Ya-Jie Wu, Chuanwei Zhang
The interplay between non-Hermiticity and topology opens an exciting avenue for engineering novel topological matter with unprecedented properties. While previous studies have main…
Zero Bias Conductance Peak in Dirac Semimetal-Superconductor Devices
W. Yu, Rafael Haenel, M. A. Rodriguez +5
Majorana zero modes (MZMs), fundamental building blocks for realizing topological quantum computers, can appear at the interface between a superconductor and a topological material…
Two-dimensional non-Hermitian topological phases induced by asymmetric hopping in a one-dimensional superlattice
Junpeng Hou, Ya-Jie Wu, Chuanwei Zhang
Non-Hermitian systems can host topological states with novel topological invariants and bulk-edge correspondences that are distinct from conventional Hermitian systems. Here we sho…
In-plane Zeeman field induced Majorana corner and hinge modes in an -wave superconductor heterostructure
Ya-Jie Wu, Junpeng Hou, Yun-Mei Li +3
Second-order topological superconductors host Majorana corner and hingemodes in contrast to conventional edge and surface modes in two and three dimensions. However, the realizatio…
Formation of Graphene atop a Si adlayer on the C-face of SiC
Jun Li, Qingxiao Wang, Guowei He +6
The structure of the SiC(000-1) surface, the C-face of the {0001} SiC surfaces, is studied as a function of temperature and of pressure in a gaseous environment of disilane (Si2H6)…
Composite Dirac Semimetal
Ziming Zhu, Zhi-Ming Yu, Weikang Wu +4
Weak topological insulators and Dirac semimetals are gapped and nodal phases with distinct topological properties, respectively. Here, we propose a novel topological phase that exh…
Higher-order topological corner states induced by gain and loss
Xi-Wang Luo, Chuanwei Zhang
The concept of topological phases has been generalized to higher-order topological insulators and superconductors with novel boundary states on corners or hinges. Meanwhile, recent…
Scalable Atomistic Simulations of Quantum Electron Transport using Empirical Pseudopotentials
Maarten L. Van de Put, Massimo V. Fischetti, William G. Vandenberghe
The simulation of charge transport in ultra-scaled electronic devices requires the knowledge of the atomic configuration and the associated potential. Such "atomistic" device simul…
Majorana corner modes with solitons in an attractive Hubbard-Hofstadter model of cold atom optical lattices
Chuanchang Zeng, T. D. Stanescu, Chuanwei Zhang +2
Higher order topological superconductors hosting Majorana-Kramers pairs (MKPs) as corner modes have recently been proposed in a two-dimensional (2D) quantum spin Hall insulator (QS…