Quantum spin Hall state in monolayer 1T'-WTe                         2

Shujie Tang; Chaofan Zhang; DIllon Wong; Zahra Pedramrazi; Hsin Zon Tsai; Chunjing Jia; Brian Moritz; Martin Claassen; Hyejin Ryu; Salman Kahn; Juan Jiang; Hao Yan; Makoto Hashimoto; Donghui Lu; Robert G. Moore; Chan Cuk Hwang; Choongyu Hwang; Zahid Hussain; Yulin Chen; Miguel M. Ugeda; Zhi Liu; Xiaoming Xie; Thomas P. Devereaux; Michael F. Crommie; Sung Kwan Mo; Zhi Xun Shen

doi:10.1038/nphys4174

Quantum spin Hall state in monolayer 1T'-WTe ₂

Shujie Tang, Chaofan Zhang, DIllon Wong, Zahra Pedramrazi, Hsin Zon Tsai, Chunjing Jia, Brian Moritz, Martin Claassen, Hyejin Ryu, Salman Kahn, Juan Jiang, Hao Yan, Makoto Hashimoto, Donghui Lu, Robert G. Moore, Chan Cuk Hwang, Choongyu Hwang, Zahid Hussain, Yulin Chen, Miguel M. UgedaZhi Liu, Xiaoming Xie, Thomas P. Devereaux, Michael F. Crommie, Sung Kwan Mo, Zhi Xun Shen

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653 Scopus citations

Abstract

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. By investigating the electronic structure of epitaxially grown monolayer 1T'-WTe ₂ 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'-WTe ₂ as a new class of QSH insulator with large bandgap in a robust two-dimensional materials family of transition metal dichalcogenides (TMDCs).

Original language	English
Pages (from-to)	683-687
Number of pages	5
Journal	Nature Physics
Volume	13
Issue number	7
DOIs	https://doi.org/10.1038/nphys4174
State	Published - Jul 1 2017
Externally published	Yes

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Tang, S., Zhang, C., Wong, DI., Pedramrazi, Z., Tsai, H. Z., Jia, C., Moritz, B., Claassen, M., Ryu, H., Kahn, S., Jiang, J., Yan, H., Hashimoto, M., Lu, D., Moore, R. G., Hwang, C. C., Hwang, C., Hussain, Z., Chen, Y., ... Shen, Z. X. (2017). Quantum spin Hall state in monolayer 1T'-WTe ₂ Nature Physics, 13(7), 683-687. https://doi.org/10.1038/nphys4174

@article{e4d6b308563d46b698aa73cebe3e8066,

title = " Quantum spin Hall state in monolayer 1T'-WTe 2 ",

abstract = " 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. By investigating the electronic structure of epitaxially grown monolayer 1T'-WTe 2 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'-WTe 2 as a new class of QSH insulator with large bandgap in a robust two-dimensional materials family of transition metal dichalcogenides (TMDCs). ",

author = "Shujie Tang and Chaofan Zhang and DIllon Wong and Zahra Pedramrazi and Tsai, {Hsin Zon} and Chunjing Jia and Brian Moritz and Martin Claassen and Hyejin Ryu and Salman Kahn and Juan Jiang and Hao Yan and Makoto Hashimoto and Donghui Lu and Moore, {Robert G.} and Hwang, {Chan Cuk} and Choongyu Hwang and Zahid Hussain and Yulin Chen and Ugeda, {Miguel M.} and Zhi Liu and Xiaoming Xie and Devereaux, {Thomas P.} and Crommie, {Michael F.} and Mo, {Sung Kwan} and Shen, {Zhi Xun}",

year = "2017",

month = jul,

day = "1",

doi = "10.1038/nphys4174",

language = "English",

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Tang, S, Zhang, C, Wong, DI, Pedramrazi, Z, Tsai, HZ, Jia, C, Moritz, B, Claassen, M, Ryu, H, Kahn, S, Jiang, J, Yan, H, Hashimoto, M, Lu, D, Moore, RG, Hwang, CC, Hwang, C, Hussain, Z, Chen, Y, Ugeda, MM, Liu, Z, Xie, X, Devereaux, TP, Crommie, MF, Mo, SK & Shen, ZX 2017, ' Quantum spin Hall state in monolayer 1T'-WTe ₂ ', Nature Physics, vol. 13, no. 7, pp. 683-687. https://doi.org/10.1038/nphys4174

TY - JOUR

T1 - Quantum spin Hall state in monolayer 1T'-WTe 2

AU - Tang, Shujie

AU - Zhang, Chaofan

AU - Wong, DIllon

AU - Pedramrazi, Zahra

AU - Tsai, Hsin Zon

AU - Jia, Chunjing

AU - Moritz, Brian

AU - Claassen, Martin

AU - Ryu, Hyejin

AU - Kahn, Salman

AU - Jiang, Juan

AU - Yan, Hao

AU - Hashimoto, Makoto

AU - Lu, Donghui

AU - Moore, Robert G.

AU - Hwang, Chan Cuk

AU - Hwang, Choongyu

AU - Hussain, Zahid

AU - Chen, Yulin

AU - Ugeda, Miguel M.

AU - Liu, Zhi

AU - Xie, Xiaoming

AU - Devereaux, Thomas P.

AU - Crommie, Michael F.

AU - Mo, Sung Kwan

AU - Shen, Zhi Xun

PY - 2017/7/1

Y1 - 2017/7/1

N2 - 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. By investigating the electronic structure of epitaxially grown monolayer 1T'-WTe 2 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'-WTe 2 as a new class of QSH insulator with large bandgap in a robust two-dimensional materials family of transition metal dichalcogenides (TMDCs).

AB - 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. By investigating the electronic structure of epitaxially grown monolayer 1T'-WTe 2 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'-WTe 2 as a new class of QSH insulator with large bandgap in a robust two-dimensional materials family of transition metal dichalcogenides (TMDCs).

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VL - 13

SP - 683

EP - 687

JO - Nature Physics

JF - Nature Physics

IS - 7

ER -

Quantum spin Hall state in monolayer 1T'-WTe ₂

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