Theory of glide symmetry protected helical edge states in a WTe2 monolayer

doi:10.1103/PhysRevB.107.195105

	Theory of glide symmetry protected helical edge states in a WTe2 monolayer
	Bieniek, Maciej 1,2,3; Väyrynen, Jukka I.4; Li, Gang5 ; Neupert, Titus 6; Thomale, Ronny 1
	2023-05-15
发表期刊	PHYSICAL REVIEW B (IF:3.2[JCR-2023],3.3[5-Year])
ISSN	2469-9950
EISSN	2469-9969
卷号	107 期号:19
DOI	10.1103/PhysRevB.107.195105
摘要	Helical edge states in quantum spin Hall (QSH) materials are central building blocks of topological matter design and engineering. Despite their principal topological protection against elastic backscattering, the level of operational stability depends on manifold parameters such as the band gap of the given semiconductor system in the "inverted"regime, temperature, disorder, and crystal orientation. We theoretically investigate electronic and transport properties of QSH edge states in large gap 1-T′ WTe2 monolayers. We explore the impact of edge termination, disorder, temperature, and interactions on experimentally addressable edge state observables, such as local density of states and conductance. We show that conductance quantization can remain surprisingly robust even for heavily disordered samples because of an anomalously small edge state decay length and additional protection related to the large direct gap allowed by glide symmetry. From the simulation of temperature-dependent resistance, we find that moderate disorder enhances the stability of conductance by localizing bulk states. We evaluate the edge state velocity and Luttinger liquid parameter as functions of the chemical potential, finding prospects for physics beyond linear helical Luttinger liquids in samples with ultraclean and well-defined edges. © 2023 American Physical Society.
关键词	Crystal orientation Energy gap Quantum theory Tellurium compounds Topology Building blockes Conductance quantization Edge state Edge termination Elastic backscattering Local density of state Luttinger liquids Operational stability Quantum spin halls Semiconductor systems
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收录类别	EI
语种	英语
出版者	American Physical Society
EI入藏号	20232014085582
EI主题词	Monolayers
EI分类号	921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory ; 931.4 Quantum Theory ; Quantum Mechanics ; 933.1.1 Crystal Lattice
原始文献类型	Journal article (JA)
引用统计	正在获取...
文献类型	期刊论文
条目标识符	https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/305058
专题	物质科学与技术学院物质科学与技术学院_PI研究组_李刚组
通讯作者	Bieniek, Maciej
作者单位	1.Institut für Theoretische Physik und Astrophysik, Universität Würzburg, Würzburg; 97074, Germany; 2.Department of Theoretical Physics, Wroclaw University of Science and Technology, Wybrzee Wyspiaskiego 27, Wroclaw; 50-370, Poland; 3.Department of Physics, University of Ottawa, Ottawa; ON; K1N 6N5, Canada; 4.Department of Physics and Astronomy, Purdue University, West Lafayette; IN; 47907, United States; 5.School of Physical Science and Technology, ShanghaiTech University, Shanghai; 201210, China; 6.Department of Physics, University of Zurich, Winterthurerstrasse 190, Zurich; 8057, Switzerland
推荐引用方式 GB/T 7714	Bieniek, Maciej,Väyrynen, Jukka I.,Li, Gang,et al. Theory of glide symmetry protected helical edge states in a WTe2 monolayer[J]. PHYSICAL REVIEW B,2023,107(19).
APA	Bieniek, Maciej,Väyrynen, Jukka I.,Li, Gang,Neupert, Titus,&Thomale, Ronny.(2023).Theory of glide symmetry protected helical edge states in a WTe2 monolayer.PHYSICAL REVIEW B,107(19).
MLA	Bieniek, Maciej,et al."Theory of glide symmetry protected helical edge states in a WTe2 monolayer".PHYSICAL REVIEW B 107.19(2023).