Josephson Junctions in Graphene Constrictions in the Quantum Hall Regime

ORAL

Abstract

Several groups have recently reported on samples made of encapsulated graphene with superconducting contacts in the quantum Hall (QH) regime. Here, we study ballistic graphene Josephson devices based on ~100nm constrictions between superconducting molybdenum-rhenium electrodes in the QH regime. A robust supercurrent has been observed up to 2.5 T, well above the onset of the Hall quantization. We demonstrate that the supercurrent is conducted by the states within the short and narrow channel confined on each side by the gapped graphene bulk. This situation is different from our previous observation of supercurrent.

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Presenters

  • Ming-Tso Wei

    Physics, Duke University, Duke University, Physics, Duke Univ

Authors

  • Ming-Tso Wei

    Physics, Duke University, Duke University, Physics, Duke Univ

  • Anne Draelos

    Physics, Duke University, Duke University, Physics, Duke Univ

  • Andrew Seredinski

    Physics, Duke University, Duke University, Physics, Duke Univ

  • Chung-Ting Ke

    Physics, Duke University, Duke University, Physics, Duke Univ

  • Yash Mehta

    Appalachian State University, Physics and Astronomy, Appalachian State Univeristy, Physics and Astronomy, Appalachian State University

  • Ethan Mancil

    Appalachian State University, Physics and Astronomy, Appalachian State Univeristy, Physics and Astronomy, Appalachian State University

  • Kenji Watanabe

    National Institute for Materials Science, NIMS, National Institute for Material Science, Advanced Materials Laboratory, National Institute for Materials Science, National Institute of Materials Science, Research Center for Functional Materials, National Institute for Materials Science, National Institute for Materials Science (NIMS, Advanced Materials Laboratory, NIMS, National Institute for Materials Science, Advanced Materials Laboratory, National Institue for Materials Science, National Institute of Material Science, National Institute for Matericals Science, Advanced Materials Laboratory, National Institute for Materials Science, 1-1 Namiki, Advanced materials laboratory, National institute for Materials Science, NIMS-Japan

  • Takashi Taniguchi

    National Institute for Materials Science, NIMS, National Institute for Material Science, Advanced Materials Laboratory, National Institute for Materials Science, National Institute of Materials Science, Research Center for Functional Materials, National Institute for Materials Science, National Institute for Materials Science (NIMS, Advanced Materials Laboratory, NIMS, National Institute for Materials Science, Advanced Materials Laboratory, National Institue for Materials Science, National Institute of Material Science, National Institute for Matericals Science, Advanced Materials Laboratory, National Institute for Materials Science, 1-1 Namiki, NIMS-Japan

  • Michihisa Yamamoto

    Department of Applied Physics, University of Tokyo, University of Tokyo, JST, PRESTO, JST, Applied Physics, University of Tokyo

  • Seigo Tarucha

    Department of Applied Physics, University of Tokyo, University of Tokyo, Department of Applied Physics, The University of Tokyo, Applied Physics, University of Tokyo, Applied Physics, The University of Tokyo

  • Ivan Borzenets

    University of Tokyo, City University of Hong Kong, Department of Physics, City University of Hong Kong

  • Francois Amet

    Appalachian State University, Physics and Astronomy, Appalachian State Univeristy, Physics and Astronomy, Appalachian State University

  • Gleb Finkelstein

    Physics, Duke University, Duke University, Physics, Duke Univ