IDEAS home Printed from https://ideas.repec.org/a/nat/natcom/v12y2021i1d10.1038_s41467-021-21672-9.html
   My bibliography  Save this article

Current-induced switching of proximity-induced ferromagnetic surface states in a topological insulator

Author

Listed:
  • Masataka Mogi

    (University of Tokyo
    RIKEN Center for Emergent Matter Science (CEMS)
    Department of Physics, Massachusetts Institute of Technology)

  • Kenji Yasuda

    (University of Tokyo
    Department of Physics, Massachusetts Institute of Technology)

  • Reika Fujimura

    (University of Tokyo)

  • Ryutaro Yoshimi

    (RIKEN Center for Emergent Matter Science (CEMS))

  • Naoki Ogawa

    (University of Tokyo
    RIKEN Center for Emergent Matter Science (CEMS))

  • Atsushi Tsukazaki

    (Tohoku University)

  • Minoru Kawamura

    (RIKEN Center for Emergent Matter Science (CEMS))

  • Kei S. Takahashi

    (RIKEN Center for Emergent Matter Science (CEMS))

  • Masashi Kawasaki

    (University of Tokyo
    RIKEN Center for Emergent Matter Science (CEMS))

  • Yoshinori Tokura

    (University of Tokyo
    RIKEN Center for Emergent Matter Science (CEMS)
    Tokyo College, University of Tokyo)

Abstract

Electrical manipulation of magnetization could be an essential function for energy-efficient spintronics technology. A magnetic topological insulator, possessing a magnetically gapped surface state with spin-polarized electrons, not only exhibits exotic topological phases relevant to the quantum anomalous Hall state but also enables the electrical control of its magnetic state at the surface. Here, we demonstrate efficient current-induced switching of the surface ferromagnetism in hetero-bilayers consisting of the topological insulator (Bi1-xSbx)2Te3 and the ferromagnetic insulator Cr2Ge2Te6, where the proximity-induced ferromagnetic surface states play two roles: efficient charge-to-spin current conversion and emergence of large anomalous Hall effect. The sign reversal of the surface ferromagnetic states with current injection is clearly observed, accompanying the nearly full magnetization reversal in the adjacent insulating Cr2Ge2Te6 layer of an optimal thickness range. The present results may facilitate an electrical control of dissipationless topological-current circuits.

Suggested Citation

  • Masataka Mogi & Kenji Yasuda & Reika Fujimura & Ryutaro Yoshimi & Naoki Ogawa & Atsushi Tsukazaki & Minoru Kawamura & Kei S. Takahashi & Masashi Kawasaki & Yoshinori Tokura, 2021. "Current-induced switching of proximity-induced ferromagnetic surface states in a topological insulator," Nature Communications, Nature, vol. 12(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-21672-9
    DOI: 10.1038/s41467-021-21672-9
    as

    Download full text from publisher

    File URL: https://www.nature.com/articles/s41467-021-21672-9
    File Function: Abstract
    Download Restriction: no
    File URL: https://libkey.io/10.1038/s41467-021-21672-9?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
    ---><---

    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_s41467-021-21672-9. 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.