Article Tunable transmission of quantum Hall edge channels with full degeneracy lifting in split-gated graphene devices

Katrin Zimmermann ; Anna Jordan ; Frédéric Gay ; Kenji Watanabe SAMURAI ORCID (National Institute for Materials Science) ; Takashi Taniguchi SAMURAI ORCID (National Institute for Materials Science) ; Zheng Han ; Vincent Bouchiat ; Hermann Sellier ; Benjamin Sacépé

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Katrin Zimmermann, Anna Jordan, Frédéric Gay, Kenji Watanabe, Takashi Taniguchi, Zheng Han, Vincent Bouchiat, Hermann Sellier, Benjamin Sacépé. Tunable transmission of quantum Hall edge channels with full degeneracy lifting in split-gated graphene devices. Nature Communications. 2017, 8 (), 14983. https://doi.org/10.1038/ncomms14983
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(abstract)

We show that electron-hole mixing is drastically reduced in high mobility graphene van-der-Waals heterostructures thanks to the full degeneracy lifting of the Landau levels, enabling quantum point contact operation with full channel pinch-off. We demonstrate gate-tunable selective transmission of integer and fractional quantum Hall edge channels through the quantum point contact. This gate-control of edge channels opens the door to quantum Hall interferometry and electron quantum optics experiments in the integer and fractional quantum Hall regimes of graphene.

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Keyword: Quantum Hall regime, graphene, quantum point contact

Date published: 2017-04-13

Publisher: Springer Science and Business Media LLC

Journal:

  • Nature Communications (ISSN: 20411723) vol. 8 14983

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Manuscript type: Publisher's version (Version of record)

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First published URL: https://doi.org/10.1038/ncomms14983

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Updated at: 2025-02-27 08:30:08 +0900

Published on MDR: 2025-02-27 08:30:09 +0900

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