Edge channels of broken-symmetry quantum Hall states in graphene visualized by atomic force microscopy

Sungmin Kim; Johannes Schwenk; Daniel Walkup; Yihang Zeng; Fereshte Ghahari; Son T. Le; Marlou R. Slot; Julian Berwanger; Steven R. Blankenship; Kenji Watanabe; Takashi Taniguchi; Franz J. Giessibl; Nikolai B. Zhitenev; Cory R. Dean; Joseph A. Stroscio

doi:10.1038/s41467-021-22886-7

Nature Communications (May 2021)

Edge channels of broken-symmetry quantum Hall states in graphene visualized by atomic force microscopy

Sungmin Kim,
Johannes Schwenk,
Daniel Walkup,
Yihang Zeng,
Fereshte Ghahari,
Son T. Le,
Marlou R. Slot,
Julian Berwanger,
Steven R. Blankenship,
Kenji Watanabe,
Takashi Taniguchi,
Franz J. Giessibl,
Nikolai B. Zhitenev,
Cory R. Dean,
Joseph A. Stroscio

Affiliations

Sungmin Kim: Physical Measurement Laboratory, National Institute of Standards and Technology
Johannes Schwenk: Physical Measurement Laboratory, National Institute of Standards and Technology
Daniel Walkup: Physical Measurement Laboratory, National Institute of Standards and Technology
Yihang Zeng: Department of Physics, Columbia University
Fereshte Ghahari: Physical Measurement Laboratory, National Institute of Standards and Technology
Son T. Le: Physical Measurement Laboratory, National Institute of Standards and Technology
Marlou R. Slot: Physical Measurement Laboratory, National Institute of Standards and Technology
Julian Berwanger: Institute of Experimental and Applied Physics, University of Regensburg
Steven R. Blankenship: Physical Measurement Laboratory, National Institute of Standards and Technology
Kenji Watanabe: Research Center for Functional Materials, National Institute for Materials Science, Tsukuba
Takashi Taniguchi: International Center for Materials Nanoarchitectonics, National Institute for Materials Science, Tsukuba
Franz J. Giessibl: Institute of Experimental and Applied Physics, University of Regensburg
Nikolai B. Zhitenev: Physical Measurement Laboratory, National Institute of Standards and Technology
Cory R. Dean: Department of Physics, Columbia University
Joseph A. Stroscio: Physical Measurement Laboratory, National Institute of Standards and Technology

DOI: https://doi.org/10.1038/s41467-021-22886-7
Journal volume & issue: Vol. 12, no. 1
pp. 1 – 11

Abstract

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The broken-symmetry edge states that are the hallmark of the quantum Hall effect in graphene have eluded spatial measurements. Here, the authors spatially map the quantum Hall broken-symmetry edge states using atomic force microscopy and show a gapped ground state proceeding from the bulk through to the quantum Hall edge boundary.

Published in Nature Communications

ISSN: 2041-1723 (Online)
Publisher: Nature Portfolio
Country of publisher: United Kingdom
LCC subjects: Science
Website: https://www.nature.com/ncomms/

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