Supercurrent in Multi-Terminal Ballistic Graphene Josephson Junctions

ORAL

Abstract

We investigated electronic properties of encapsulated graphene samples with multiple superconducting terminals. Clean ballistic devices were fabricated from graphene sandwiched by boron nitride flakes and contacted with superconducting molybdenum-rhenium. These multi-terminal devices were studied at zero magnetic field to first investigate the supercurrent among adjacent and non-adjacent Josephson junctions. We then also measured the samples in the quantum Hall (QH) regime and studied the interplay between edge states and the superconducting contacts. We discuss our results in light of various mechanisms of chiral state propagation along the QH and superconducting interfaces.

*A.D., A.S., T.F., Y.M., H.L., E.M., F.A., and G.F. were supported by ARO Award W911NF-16-1-0122 and Award W911NF-16-1-0132. M.T.W. and G.F. were supported by the Office of Basic Energy Sciences, US DoE, Award DE-SC0002765.

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Presenters

  • Anne Draelos

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

Authors

  • Anne Draelos

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

  • Ming-Tso Wei

    • 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

  • Hengming Li

    • Appalachian State University
    • Physics and Astronomy, Appalachian State University

  • 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

  • Tate Fleming

    • Appalachian State University
    • 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