Nature Communications (Jul 2021)

Upstream modes and antidots poison graphene quantum Hall effect

  • N. Moreau,
  • B. Brun,
  • S. Somanchi,
  • K. Watanabe,
  • T. Taniguchi,
  • C. Stampfer,
  • B. Hackens

DOI
https://doi.org/10.1038/s41467-021-24481-2
Journal volume & issue
Vol. 12, no. 1
pp. 1 – 7

Abstract

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It was suggested that the breakdown of the quantum Hall effect in graphene originates from the coupling between counter propagating edge modes. Here, by using scanning gate microscopy, the authors propose a microscopic mechanism of this coupling due to antidots present at graphene edges.