IDEAS home Printed from https://ideas.repec.org/a/nat/natcom/v10y2019i1d10.1038_s41467-019-11971-7.html
   My bibliography  Save this article

Giant oscillations in a triangular network of one-dimensional states in marginally twisted graphene

Author

Listed:
  • S. G. Xu

    (University of Manchester
    University of Manchester)

  • A. I. Berdyugin

    (University of Manchester)

  • P. Kumaravadivel

    (University of Manchester
    University of Manchester)

  • F. Guinea

    (University of Manchester)

  • R. Krishna Kumar

    (University of Manchester
    University of Manchester)

  • D. A. Bandurin

    (University of Manchester)

  • S. V. Morozov

    (Russian Academy of Sciences)

  • W. Kuang

    (University of Manchester)

  • B. Tsim

    (University of Manchester
    University of Manchester)

  • S. Liu

    (Kansas State University)

  • J. H. Edgar

    (Kansas State University)

  • I. V. Grigorieva

    (University of Manchester)

  • V. I. Fal’ko

    (University of Manchester
    University of Manchester)

  • M. Kim

    (University of Manchester)

  • A. K. Geim

    (University of Manchester
    University of Manchester)

Abstract

At very small twist angles of ∼0.1°, bilayer graphene exhibits a strain-accompanied lattice reconstruction that results in submicron-size triangular domains with the standard, Bernal stacking. If the interlayer bias is applied to open an energy gap inside the domain regions making them insulating, such marginally twisted bilayer graphene is expected to remain conductive due to a triangular network of chiral one-dimensional states hosted by domain boundaries. Here we study electron transport through this helical network and report giant Aharonov-Bohm oscillations that reach in amplitude up to 50% of resistivity and persist to temperatures above 100 K. At liquid helium temperatures, the network exhibits another kind of oscillations that appear as a function of carrier density and are accompanied by a sign-changing Hall effect. The latter are attributed to consecutive population of the narrow minibands formed by the network of one-dimensional states inside the gap.

Suggested Citation

  • S. G. Xu & A. I. Berdyugin & P. Kumaravadivel & F. Guinea & R. Krishna Kumar & D. A. Bandurin & S. V. Morozov & W. Kuang & B. Tsim & S. Liu & J. H. Edgar & I. V. Grigorieva & V. I. Fal’ko & M. Kim & A, 2019. "Giant oscillations in a triangular network of one-dimensional states in marginally twisted graphene," Nature Communications, Nature, vol. 10(1), pages 1-5, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-11971-7
    DOI: 10.1038/s41467-019-11971-7
    as

    Download full text from publisher

    File URL: https://www.nature.com/articles/s41467-019-11971-7
    File Function: Abstract
    Download Restriction: no
    File URL: https://libkey.io/10.1038/s41467-019-11971-7?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:10:y:2019:i:1:d:10.1038_s41467-019-11971-7. 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.