Quantum spin Hall state in monolayer 1T '-WTe2

doi:10.1038/NPHYS4174

	Quantum spin Hall state in monolayer 1T '-WTe2
	Tang, Shujie1,2,3,4,5,6 ; Zhang, Chaofan 1,2,3; Wong, Dillon 7; Pedramrazi, Zahra 7; Tsai, Hsin-Zon 7; Jia, Chunjing 1,2,3; Moritz, Brian 1; Claassen, Martin 1; Ryu, Hyejin 4,8,9; Kahn, Salman 7; Jiang, Juan4,6,10 ; Yan, Hao 1,2,3; Hashimoto, Makoto 11; Lu, Donghui 11; Moore, Robert G.1,2,3; Hwang, Chan-Cuk 10; Hwang, Choongyu 9; Hussain, Zahid 4; Chen, Yulin 12,13; Ugeda, Miguel M.14,15; Liu, Zhi5,6 ; Xie, Xiaoming5,6 ; Devereaux, Thomas P.1,2,3; Crommie, Michael F.7,16,17,18; Mo, Sung-Kwan 4; Shen, Zhi-Xun 1,2,3
	2017-07
发表期刊	NATURE PHYSICS
ISSN	1745-2473
卷号	13 期号:7 页码:683-+
发表状态	已发表
DOI	10.1038/NPHYS4174
摘要	A quantum spin Hall (QSH) insulator is a novel two-dimensional quantum state of matter that features quantized Hall conductance in the absence of a magnetic field, resulting from topologically protected dissipationless edge states that bridge the energy gap opened by band inversion and strong spin-orbit coupling(1,2). By investigating the electronic structure of epitaxially grown monolayer 1T'-WTe2 using angle-resolved photoemission (ARPES) and first-principles calculations, we observe clear signatures of topological band inversion and bandgap opening, which are the hallmarks of a QSH state. Scanning tunnelling microscopy measurements further confirm the correct crystal structure and the existence of a bulk bandgap, and provide evidence for a modified electronic structure near the edge that is consistent with the expectations for a QSH insulator. Our results establish monolayer 1T'-WTe2 as a new class of QSH insulator with large bandgap in a robust two-dimensional materials family of transition metal dichalcogenides (TMDCs).
收录类别	SCI ; EI
语种	英语
资助项目	US Department of Energy, Office of Science[DE-AC02-05CH11231]
WOS研究方向	Physics
WOS类目	Physics, Multidisciplinary
WOS记录号	WOS:000404629900018
出版者	NATURE PUBLISHING GROUP
EI入藏号	20190806528694
EI主题词	Calculations ; Crystal structure ; Electronic structure ; Energy gap ; Metal insulator transition ; Monolayers ; Quantum Hall effect ; Scanning tunneling microscopy ; Topology ; Transition metals
EI分类号	Metallurgy and Metallography:531 ; Mathematics:921 ; Combinatorial Mathematics, Includes Graph Theory, Set Theory:921.4 ; Classical Physics; Quantum Theory; Relativity:931 ; Quantum Theory; Quantum Mechanics:931.4 ; Crystal Lattice:933.1.1
WOS关键词	TOPOLOGICAL EDGE STATES ; TRANSITION ; WELLS
原始文献类型	Article
引用统计
文献类型	期刊论文
条目标识符	https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/2905
专题	物质科学与技术学院大科学中心_PI研究组_刘志组物质科学与技术学院_特聘教授组_谢晓明组物质科学与技术学院_特聘教授组_陈宇林物质科学与技术学院_公共科研平台_上科大-微系统所联合实验室
通讯作者	Mo, Sung-Kwan; Shen, Zhi-Xun
作者单位	1.SLAC Natl Accelerator Lab, Stanford Inst Mat & Energy Sci, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA 2.Stanford Univ, Geballe Lab Adv Mat, Dept Phys, Stanford, CA 94305 USA 3.Stanford Univ, Geballe Lab Adv Mat, Dept Appl Phys, Stanford, CA 94305 USA 4.Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA 5.Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol, State Key Lab Funct Mat Informat, Shanghai 200050, Peoples R China 6.Shanghai Tech Univ, Sch Phys Sci & Technol, Shanghai 200031, Peoples R China 7.Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA 8.POSTECH, Max Plank POSTECH Ctr Complex Phase Mat, Pohang 37673, South Korea 9.Pusan Natl Univ, Dept Phys, Busan 46241, South Korea 10.POSTECH, Pohang Accelerator Lab, Pohang 37673, South Korea 11.SLAC Natl Accelerator Lab, Stanford Synchrotron Radiat Lightsource, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA 12.Univ Oxford, Dept Phys, Parks Rd, Oxford OX1 3PU, England 13.Univ Oxford, Clarendon Lab, Parks Rd, Oxford OX1 3PU, England 14.Basque Fdn Sci, Ikerbasque, Bilbao 48013, Spain 15.CIC NanoGUNE, San Sebastian 20018, Spain 16.Lawrence Berkeley Natl Lab, Mat Sci Div, Berkeley, CA 94720 USA 17.Univ Calif Berkeley, Kavli Energy Nano Sci Inst, Berkeley, CA 94720 USA 18.Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA
第一作者单位	物质科学与技术学院
推荐引用方式 GB/T 7714	Tang, Shujie,Zhang, Chaofan,Wong, Dillon,et al. Quantum spin Hall state in monolayer 1T '-WTe2[J]. NATURE PHYSICS,2017,13(7):683-+.
APA	Tang, Shujie.,Zhang, Chaofan.,Wong, Dillon.,Pedramrazi, Zahra.,Tsai, Hsin-Zon.,...&Shen, Zhi-Xun.(2017).Quantum spin Hall state in monolayer 1T '-WTe2.NATURE PHYSICS,13(7),683-+.
MLA	Tang, Shujie,et al."Quantum spin Hall state in monolayer 1T '-WTe2".NATURE PHYSICS 13.7(2017):683-+.