Observation of the spinful higher-order topology in multilayer Td-WTe2

Jekwan Lee; Jaehyeon Kwon; Eunho Lee; Jiwon Park; Soonyoung Cha; Kenji Watanabe; Takashi Taniguci; Moon Ho Jo; Hyunyong Choi

Observation of the spinful higher-order topology in multilayer T_d-WTe₂

Jekwan Lee, Jaehyeon Kwon, Eunho Lee, Jiwon Park, Soonyoung Cha, Kenji Watanabe, Takashi Taniguci, Moon Ho Jo, Hyunyong Choi

Department of Electrical and Electronic Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

We propose evidence that the multilayer T_d-WTe₂ is a higher-order topological insulator. By measuring the Kerr effect using the graphene/WTe₂ heterostructure, we revealed the existence of spinful topological hinge states protected by the time-reversal symmetry.

Original language	English
Title of host publication	CLEO
Subtitle of host publication	QELS_Fundamental Science, QELS 2022
Publisher	Optica Publishing Group (formerly OSA)
ISBN (Electronic)	9781557528209
Publication status	Published - 2022
Event	CLEO: QELS_Fundamental Science, QELS 2022 - San Jose, United States Duration: 2022 May 15 → 2022 May 20

Publication series

Name	Optics InfoBase Conference Papers

Conference

Conference	CLEO: QELS_Fundamental Science, QELS 2022
Country/Territory	United States
City	San Jose
Period	22/5/15 → 22/5/20

Bibliographical note

Funding Information:
This study is supported by the National Research Foundation of Korea (NRF) through the government of Korea (Grant No. NRF-2021R1A2C3005905, NRF-2020M3F3A2A03082472, 2019R1A6A1A10073437), Creative materials Discovery program (Grant No. 2017M3D1A1040828), Scalable Quantum Computer Technology Platform Center (Grant No. 2019R1A5A1027055), and the Institute for Basic Science (IBS), Korea, under Project Code IBS-R014-G1-2018-A1. Part of this study has been performed using facilities at IBS Center for Correlated Electron Systems, Seoul National University.

Publisher Copyright:
© Optica Publishing Group 2022, © 2022 The Author(s)

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Mechanics of Materials

Cite this

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title = "Observation of the spinful higher-order topology in multilayer Td-WTe2",

abstract = "We propose evidence that the multilayer Td-WTe2 is a higher-order topological insulator. By measuring the Kerr effect using the graphene/WTe2 heterostructure, we revealed the existence of spinful topological hinge states protected by the time-reversal symmetry.",

author = "Jekwan Lee and Jaehyeon Kwon and Eunho Lee and Jiwon Park and Soonyoung Cha and Kenji Watanabe and Takashi Taniguci and Jo, {Moon Ho} and Hyunyong Choi",

note = "Funding Information: This study is supported by the National Research Foundation of Korea (NRF) through the government of Korea (Grant No. NRF-2021R1A2C3005905, NRF-2020M3F3A2A03082472, 2019R1A6A1A10073437), Creative materials Discovery program (Grant No. 2017M3D1A1040828), Scalable Quantum Computer Technology Platform Center (Grant No. 2019R1A5A1027055), and the Institute for Basic Science (IBS), Korea, under Project Code IBS-R014-G1-2018-A1. Part of this study has been performed using facilities at IBS Center for Correlated Electron Systems, Seoul National University. Publisher Copyright: {\textcopyright} Optica Publishing Group 2022, {\textcopyright} 2022 The Author(s); CLEO: QELS_Fundamental Science, QELS 2022 ; Conference date: 15-05-2022 Through 20-05-2022",

year = "2022",

language = "English",

series = "Optics InfoBase Conference Papers",

publisher = "Optica Publishing Group (formerly OSA)",

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TY - GEN

T1 - Observation of the spinful higher-order topology in multilayer Td-WTe2

AU - Lee, Jekwan

AU - Kwon, Jaehyeon

AU - Lee, Eunho

AU - Park, Jiwon

AU - Cha, Soonyoung

AU - Watanabe, Kenji

AU - Taniguci, Takashi

AU - Jo, Moon Ho

AU - Choi, Hyunyong

N1 - Funding Information: This study is supported by the National Research Foundation of Korea (NRF) through the government of Korea (Grant No. NRF-2021R1A2C3005905, NRF-2020M3F3A2A03082472, 2019R1A6A1A10073437), Creative materials Discovery program (Grant No. 2017M3D1A1040828), Scalable Quantum Computer Technology Platform Center (Grant No. 2019R1A5A1027055), and the Institute for Basic Science (IBS), Korea, under Project Code IBS-R014-G1-2018-A1. Part of this study has been performed using facilities at IBS Center for Correlated Electron Systems, Seoul National University. Publisher Copyright: © Optica Publishing Group 2022, © 2022 The Author(s)

PY - 2022

Y1 - 2022

N2 - We propose evidence that the multilayer Td-WTe2 is a higher-order topological insulator. By measuring the Kerr effect using the graphene/WTe2 heterostructure, we revealed the existence of spinful topological hinge states protected by the time-reversal symmetry.

AB - We propose evidence that the multilayer Td-WTe2 is a higher-order topological insulator. By measuring the Kerr effect using the graphene/WTe2 heterostructure, we revealed the existence of spinful topological hinge states protected by the time-reversal symmetry.

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M3 - Conference contribution

AN - SCOPUS:85136778026

T3 - Optics InfoBase Conference Papers

BT - CLEO

PB - Optica Publishing Group (formerly OSA)

T2 - CLEO: QELS_Fundamental Science, QELS 2022

Y2 - 15 May 2022 through 20 May 2022

ER -