Quantum spin Hall state in monolayer 1T '-WTe2
Tang, Shujie1,2,3,4,5,6; Zhang, Chaofan1,2,3; Wong, Dillon7; Pedramrazi, Zahra7; Tsai, Hsin-Zon7; Jia, Chunjing1,2,3; Moritz, Brian1; Claassen, Martin1; Ryu, Hyejin4,8,9; Kahn, Salman7; Jiang, Juan4,6,10; Yan, Hao1,2,3; Hashimoto, Makoto11; Lu, Donghui11; Moore, Robert G.1,2,3; Hwang, Chan-Cuk10; Hwang, Choongyu9; Hussain, Zahid4; Chen, Yulin12,13; 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-Kwan4; Shen, Zhi-Xun1,2,3
Source PublicationNATURE PHYSICS
AbstractA 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).
Indexed BySCI ; EI
Funding ProjectUS Department of Energy, Office of Science[DE-AC02-05CH11231]
WOS Research AreaPhysics
WOS SubjectPhysics, Multidisciplinary
WOS IDWOS:000404629900018
EI Accession Number20190806528694
EI KeywordsCalculations ; Crystal structure ; Electronic structure ; Energy gap ; Metal insulator transition ; Monolayers ; Quantum Hall effect ; Scanning tunneling microscopy ; Topology ; Transition metals
EI Classification NumberMetallurgy 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
Original Document TypeArticle
Citation statistics
Cited Times:349[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorMo, Sung-Kwan; Shen, Zhi-Xun
Affiliation1.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
First Author AffilicationSchool of Physical Science and Technology
Recommended Citation
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-+.
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