Long-Distance Spin Transport Through a Graphene Quantum Hall Antiferromagnet

ORAL

Abstract

An important goal in spintronics is to establish mechanisms that minimize dissipation in the devices that are to exhibit the action of spin currents. In magnetic insulators the easy plane ordered spin currents could be carried dissipationless in the form of spin-supercurrents. Spin superfluidity transport has been theoretically predicted in a graphene quantum Hall insulator [1]. Here we report on the first experimental demonstration of the robust spin-current transport through graphene anti-ferromagnet insulator (AFMI) in the quantum Hall regime. The charge neutrality point (CNP) forms canted anti-ferromagnet (CAF) in the ground state that effectively serves as AFMI for spin currents propagation. By utilizing quantum Hall (QH) edge modes as injector, filters and detector we find large non-local signal across 5-μm long graphene CAF region. Our work demonstrates a long-distance spin transport through AFMI in graphene and shows that QH states can serve as a powerful tool for fundamental studies of ferromagnet and anti-ferromagnet spintronics.

*SHINES Energy Frontier Research Center funded by DOE BES under Award # SC0012670

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Presenters

  • Petr Stepanov

    • Physics, Ohio State Univ - Columbus
    • Ohio State Univ - Columbus

Authors

  • Petr Stepanov

    • Physics, Ohio State Univ - Columbus
    • Ohio State Univ - Columbus

  • Shi Che

    • The Ohio State University
    • Ohio State Univ - Columbus

  • Dmitry Shcherbakov

    • Ohio State Univ - Columbus

  • Jiawei Yang

    • Physics, The Ohio State University
    • Ohio State Univ - Columbus
    • Physics, Ohio State University

  • Kevin Thilahar

    • University of California, Riverside

  • Greyson Voigt

    • University of California, Riverside

  • Marc Bockrath

    • Department of Physics, The Ohio State University
    • Ohio State Univ - Columbus

  • Dmitry Smirnov

    • 1800 East Paul Dirac Drive, Natl High Magnetic Field Lab
    • Natl High Magnetic Field Lab
    • National High Magnetic Field Laboratory
    • NHMFL
    • Condensed Matter Science, National High Magnetic Field Laboratory
    • NHMFL, FSU

  • 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

  • Roger Lake

    • Department of Electrical and Computer Engineering, University of California, Riverside
    • EE, Univ of California - Riverside
    • Electrical and computer Science engineering, University of California Riverside
    • University of California, Riverside

  • Yafis Barlas

    • Univ of California - Riverside
    • Physics and Astronomy, University of California, Riverside
    • Computer and Electrical Engineering, University of California at Riverside
    • Physics, University of California, Riverside
    • University of California, Riverside

  • Allan MacDonald

    • The University of Texas at Austin
    • University of Texas
    • Univ of Texas, Austin
    • Physics, University of Texas at Austin
    • University of Texas at Austin
    • Department of Physics, University of Texas at Austin

  • Chun Ning Lau

    • Physics, Ohio State Univ - Columbus
    • Ohio State Univ - Columbus
    • The Ohio State University
    • Physics, The Ohio State University