IDEAS home Printed from https://ideas.repec.org/a/nat/natcom/v12y2021i1d10.1038_s41467-020-20564-8.html
   My bibliography  Save this article

Observation and control of the weak topological insulator state in ZrTe5

Author

Listed:
  • Peng Zhang

    (University of Tokyo)

  • Ryo Noguchi

    (University of Tokyo)

  • Kenta Kuroda

    (University of Tokyo)

  • Chun Lin

    (University of Tokyo)

  • Kaishu Kawaguchi

    (University of Tokyo)

  • Koichiro Yaji

    (National Institute for Materials Science)

  • Ayumi Harasawa

    (University of Tokyo)

  • Mikk Lippmaa

    (University of Tokyo)

  • Simin Nie

    (Stanford University)

  • Hongming Weng

    (Chinese Academy of Sciences)

  • V. Kandyba

    (Elettra - Sincrotrone Trieste)

  • A. Giampietri

    (Elettra - Sincrotrone Trieste)

  • A. Barinov

    (Elettra - Sincrotrone Trieste)

  • Qiang Li

    (Stony Brook University
    Brookhaven National Laboratory)

  • G. D. Gu

    (Brookhaven National Laboratory)

  • Shik Shin

    (University of Tokyo
    University of Tokyo)

  • Takeshi Kondo

    (University of Tokyo
    University of Tokyo)

Abstract

A quantum spin Hall (QSH) insulator hosts topological states at the one-dimensional (1D) edge, along which backscattering by nonmagnetic impurities is strictly prohibited. Its 3D analogue, a weak topological insulator (WTI), possesses similar quasi-1D topological states confined at side surfaces. The enhanced confinement could provide a route for dissipationless current and better advantages for applications relative to strong topological insulators (STIs). However, the topological side surface is usually not cleavable and is thus hard to observe. Here, we visualize the topological states of the WTI candidate ZrTe5 by spin and angle-resolved photoemission spectroscopy (ARPES): a quasi-1D band with spin-momentum locking was revealed on the side surface. We further demonstrate that the bulk band gap is controlled by external strain, realizing a more stable WTI state or an ideal Dirac semimetal (DS) state. The highly directional spin-current and the tunable band gap in ZrTe5 will provide an excellent platform for applications.

Suggested Citation

  • Peng Zhang & Ryo Noguchi & Kenta Kuroda & Chun Lin & Kaishu Kawaguchi & Koichiro Yaji & Ayumi Harasawa & Mikk Lippmaa & Simin Nie & Hongming Weng & V. Kandyba & A. Giampietri & A. Barinov & Qiang Li &, 2021. "Observation and control of the weak topological insulator state in ZrTe5," Nature Communications, Nature, vol. 12(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-020-20564-8
    DOI: 10.1038/s41467-020-20564-8
    as

    Download full text from publisher

    File URL: https://www.nature.com/articles/s41467-020-20564-8
    File Function: Abstract
    Download Restriction: no
    File URL: https://libkey.io/10.1038/s41467-020-20564-8?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Jinyu Liu & Yinong Zhou & Sebastian Yepez Rodriguez & Matthew A. Delmont & Robert A. Welser & Triet Ho & Nicholas Sirica & Kaleb McClure & Paolo Vilmercati & Joseph W. Ziller & Norman Mannella & Javie, 2024. "Controllable strain-driven topological phase transition and dominant surface-state transport in HfTe5," Nature Communications, Nature, vol. 15(1), pages 1-11, December.
    2. Lun-Hui Hu & Rui-Xing Zhang, 2024. "Dislocation Majorana bound states in iron-based superconductors," Nature Communications, Nature, vol. 15(1), pages 1-12, December.
    3. Jingyuan Zhong & Ming Yang & Zhijian Shi & Yaqi Li & Dan Mu & Yundan Liu & Ningyan Cheng & Wenxuan Zhao & Weichang Hao & Jianfeng Wang & Lexian Yang & Jincheng Zhuang & Yi Du, 2023. "Towards layer-selective quantum spin hall channels in weak topological insulator Bi4Br2I2," Nature Communications, Nature, vol. 14(1), pages 1-8, December.

    More about this item

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-020-20564-8. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Sonal Shukla or Springer Nature Abstracting and Indexing (email available below). General contact details of provider: http://www.nature.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.