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Quantum Hall-based superconducting interference device.

ABSTRACT: 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.

SUBMITTER: Seredinski A

PROVIDER: S-EPMC6744260 | biostudies-literature | 2019 Sep

REPOSITORIES: biostudies-literature

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Quantum Hall-based superconducting interference device.

Seredinski Andrew A Draelos Anne W AW Arnault Ethan G EG Wei Ming-Tso MT Li Hengming H Fleming Tate T Watanabe Kenji K Taniguchi Takashi T Amet François F Finkelstein Gleb G

Science advances 20190913 9

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 quantu ...[more]

PMID: 31548985

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