Superconducting diode effect in graphene-based multi-terminal Josephson junctions

ORAL

Abstract

Reciprocal superconducting devices show a symmetric critical current for opposite current directions. By simultaneously breaking time-reversal and inversion symmetry, one can engineer a non-reciprocal superconducting diode effect (SDE). This effect has been experimentally demonstrated in two dimensional van der Waals heterostructures and systems with magneto-chiral anisotropy. In this work, we report a tunable magnetic-field-free SDE arising from circuit network effects in graphene-based multi-terminal Josephson junctions (MTJJs). We observe the SDE between two of the terminals when a non-zero current is applied to a third terminal. We further demonstrate voltage rectification with a pulsed current realizing a superconducting diode efficiency up to 100%.

*Supported by NSF-ITE 2040667.

–

Presenters

  • Fan Zhang

    • Pennsylvania State University

Authors

  • Fan Zhang

    • Pennsylvania State University

  • Nitin Samarth

    • Pennsylvania State University
    • The Pennsylvania State University

  • Asmaul Smitha Rashid

    • Pennsylvania State University

  • Morteza Kayyalha

    • Pennsylvania State University

  • Mostafa Tanhayi Ahari

    • University of Illinois, Urbana-Champaign

  • George J De Coster

    • University of Oregon

  • Matthew J Gilbert

    • University of Illinois at Urbana-Champaign

  • Takashi Taniguchi

    • National Institute for Materials Science
    • Kyoto University

  • Kenji Watanabe

    • National Institute for Materials Science
    • Research Center for Functional Materials, National Institute of Materials Science
    • Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-044, Japan
    • NIMS
    • Research Center for Functional Materials, National Institute for Materials Science
    • National Institute for Materials Science, Japan
    • Research Center for Functional Materials, National Institute for Materials Science, Tsukuba, Japan
    • NIMS Japan