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Quantum Hall–based superconducting interference device

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 magne...

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Autores principales: Seredinski, Andrew, Draelos, Anne W., Arnault, Ethan G., Wei, Ming-Tso, Li, Hengming, Fleming, Tate, Watanabe, Kenji, Taniguchi, Takashi, Amet, François, Finkelstein, Gleb
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Association for the Advancement of Science 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6744260/
https://www.ncbi.nlm.nih.gov/pubmed/31548985
http://dx.doi.org/10.1126/sciadv.aaw8693
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author Seredinski, Andrew
Draelos, Anne W.
Arnault, Ethan G.
Wei, Ming-Tso
Li, Hengming
Fleming, Tate
Watanabe, Kenji
Taniguchi, Takashi
Amet, François
Finkelstein, Gleb
author_facet Seredinski, Andrew
Draelos, Anne W.
Arnault, Ethan G.
Wei, Ming-Tso
Li, Hengming
Fleming, Tate
Watanabe, Kenji
Taniguchi, Takashi
Amet, François
Finkelstein, Gleb
author_sort Seredinski, Andrew
collection PubMed
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- to 2-T 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 a supercurrent localized along that edge of the junction. Here, we study these supercurrents as a function of magnetic field and carrier density.
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spelling pubmed-67442602019-09-23 Quantum Hall–based superconducting interference device Seredinski, Andrew Draelos, Anne W. Arnault, Ethan G. Wei, Ming-Tso Li, Hengming Fleming, Tate Watanabe, Kenji Taniguchi, Takashi Amet, François Finkelstein, Gleb Sci Adv Research Articles 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- to 2-T 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 a supercurrent localized along that edge of the junction. Here, we study these supercurrents as a function of magnetic field and carrier density. American Association for the Advancement of Science 2019-09-13 /pmc/articles/PMC6744260/ /pubmed/31548985 http://dx.doi.org/10.1126/sciadv.aaw8693 Text en Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution License 4.0 (CC BY). http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Articles
Seredinski, Andrew
Draelos, Anne W.
Arnault, Ethan G.
Wei, Ming-Tso
Li, Hengming
Fleming, Tate
Watanabe, Kenji
Taniguchi, Takashi
Amet, François
Finkelstein, Gleb
Quantum Hall–based superconducting interference device
title Quantum Hall–based superconducting interference device
title_full Quantum Hall–based superconducting interference device
title_fullStr Quantum Hall–based superconducting interference device
title_full_unstemmed Quantum Hall–based superconducting interference device
title_short Quantum Hall–based superconducting interference device
title_sort quantum hall–based superconducting interference device
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6744260/
https://www.ncbi.nlm.nih.gov/pubmed/31548985
http://dx.doi.org/10.1126/sciadv.aaw8693
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