Large Negative Differential Resistance in a Multi-Terminal Josephson Junction

ORAL

Abstract

Multi-terminal Josephson junctions (MTJJs) have gained increasing research interest as a platform for mesoscopic superconductivity. In this talk, I will present our experimental results on a novel MTJJ structure fabricated with graphene, in which we observed a large negative differential resistance (NDR) effect. The NDR is tunable by gate voltage and multiple current biases. It is reproducible across different materials, gate designs, and superconducting contacts. We will also discuss potential physical mechanisms that can produce this effect.

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Presenters

  • Luojia Zhang

    • Cornell University

Authors

  • Luojia Zhang

    • Cornell University

  • Kushagra Aggarwal

    • University of Oxford

  • Kenji Watanabe

    • National Institute for Materials Science
    • NIMS
    • Research Center for Functional Materials, National Institute for Materials Science
    • Research Center for Electronic and Optical Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
    • Research Center for Functional Materials, National Institute of Material Science, Tsukuba, Japan
    • National Institute of Materials Science
    • Advanced Materials Laboratory, National Institute for Materials Science

  • Takashi Taniguchi

    • National Institute for Materials Science
    • International Center for Materials Nanoarchitectonics, National Institute for Materials Science
    • Research Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
    • International Center for Materials Nanoarchitectonics, National Institute of Material Science, Tsukuba, Japan
    • Advanced Materials Laboratory, National Institute for Materials Science

  • Valla Fatemi

    • Cornell University