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	2022 Conference on Lasers and Electro-Optics, CLEO 2022 - Proceedings
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9781957171050
Publication status	Published - 2022
Event	2022 Conference on Lasers and Electro-Optics, CLEO 2022 - San Jose, United States Duration: 2022 May 15 → 2022 May 20

Publication series

Name	2022 Conference on Lasers and Electro-Optics, CLEO 2022 - Proceedings

Conference

Conference	2022 Conference on Lasers and Electro-Optics, CLEO 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

Instrumentation
Spectroscopy
Biomedical Engineering
Electrical and Electronic Engineering
Management, Monitoring, Policy and Law
Materials Science (miscellaneous)
Acoustics and Ultrasonics
Atomic and Molecular Physics, and Optics

Cite this

Lee, J., Kwon, J., Lee, E., Park, J., Cha, S., Watanabe, K., Taniguci, T., Jo, M. H., & Choi, H. (2022). Observation of the spinful higher-order topology in multilayer T_d-WTe₂. In 2022 Conference on Lasers and Electro-Optics, CLEO 2022 - Proceedings [FM5N.1] (2022 Conference on Lasers and Electro-Optics, CLEO 2022 - Proceedings). Institute of Electrical and Electronics Engineers Inc..

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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); 2022 Conference on Lasers and Electro-Optics, CLEO 2022 ; Conference date: 15-05-2022 Through 20-05-2022",

year = "2022",

language = "English",

series = "2022 Conference on Lasers and Electro-Optics, CLEO 2022 - Proceedings",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

booktitle = "2022 Conference on Lasers and Electro-Optics, CLEO 2022 - Proceedings",

address = "United States",

}

Lee, J, Kwon, J, Lee, E, Park, J, Cha, S, Watanabe, K, Taniguci, T, Jo, MH & Choi, H 2022, Observation of the spinful higher-order topology in multilayer T_d-WTe₂. in 2022 Conference on Lasers and Electro-Optics, CLEO 2022 - Proceedings., FM5N.1, 2022 Conference on Lasers and Electro-Optics, CLEO 2022 - Proceedings, Institute of Electrical and Electronics Engineers Inc., 2022 Conference on Lasers and Electro-Optics, CLEO 2022, San Jose, United States, 22/5/15.

Observation of the spinful higher-order topology in multilayer T_d-WTe₂. / Lee, Jekwan; Kwon, Jaehyeon; Lee, Eunho et al.

2022 Conference on Lasers and Electro-Optics, CLEO 2022 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 2022. FM5N.1 (2022 Conference on Lasers and Electro-Optics, CLEO 2022 - Proceedings).

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

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:85139907480

T3 - 2022 Conference on Lasers and Electro-Optics, CLEO 2022 - Proceedings

BT - 2022 Conference on Lasers and Electro-Optics, CLEO 2022 - Proceedings

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 2022 Conference on Lasers and Electro-Optics, CLEO 2022

Y2 - 15 May 2022 through 20 May 2022

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