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Description:

We present a study of a graphene-based Josephson junction with dedicated side gates carved from the same sheet of graphene as the junction itself. These side gates are highly efficient, and allow us to modulate carrier density along either edge of the junction in a wide range. In particular, in magnetic fields in the $1-2$ Tesla range, we are able to populate the next Landau level, resulting in Hall plateaus with conductance that differs from the bulk filling factor. When counter-propagating quantum Hall edge states are introduced along either edge, we observe supercurrent localized along that edge of the junction. Here we study these supercurrents as a function of magnetic field and carrier density.

Rights:

• Creative Commons BY Attribution 4.0 International
  

Keyword: Graphene-based Josephson junction, side gates, supercurrent

Date published: 2019-09-06

Publisher: American Association for the Advancement of Science (AAAS)

Journal:

• Science Advances (ISSN: 23752548) vol. 5 issue. 9 eaaw8693

Funding:

• National Science Foundation ECCS-1610213
• National Science Foundation DMR-1743907
• Army Research Office W911NF16-1-0122
• Army Research Office W911NF-16-1-0132
• Division of Materials Sciences and Engineering DE-SC0002765
• Japan Society for the Promotion of Science JP15K21722
• Ministry of Education, Culture, Sports, Science, and Technology
• Japan Society for the Promotion of Science Grant-in-Aid for Scientific Research A (No. 26248061)
• Japan Society for the Promotion of Science Innovative Areas Nano Informatics (No. 25106006)

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

MDR DOI:

First published URL: https://doi.org/10.1126/sciadv.aaw8693

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Updated at: 2025-02-23 22:50:31 +0900

Published on MDR: 2025-02-23 22:50:31 +0900