Valley-Polarized Magneto-Transport via a Quantum Point Contact in Bilayer Graphene

ORAL

Abstract

We investigate low temperature magneto-transport through a gate-defined quantum point contact in bilayer graphene. We show that the valley-specific quantum Hall states can be selectively manipulated by the local electrostatic configuration and study their dependence on magnetic and displacement fields. This work paves a path towards manipulating the valley degree of freedom in gate-defined bilayer graphene quantum devices.

*This work was supported by the National Science Foundation CAREER Award NSF-1944498

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Presenters

  • Konstantin Davydov

    • University of Minnesota

Authors

  • Konstantin Davydov

    • University of Minnesota

  • Xi Zhang

    • University of Minnesota

  • Wei Ren

    • University of Minnesota

  • D. J. P. de Sousa

    • University of Minnesota

  • Matthew Coles

    • University of Minnesota

  • Logan Kline

    • University of Minnesota

  • Bryan Zucker

    • University of Minnesota

  • Kenji Watanabe

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

  • Takashi Taniguchi

    • Kyoto Univ
    • National Institute for Materials Science
    • Research Center for Materials Nanoarchitectonics
    • Research Center for Materials Nanoarchitectonics, National Institute for Materials Science
    • National Institute for Materials Sciences
    • NIMS
    • International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
    • National Institute for Material Science
    • International Center for Materials Nanoarchitectonics, NIMS, Japan
    • International Center for Materials Nanoarchitectonics, Tsukuba
    • National Institue for Materials Science
    • Kyoto University
    • National Institute of Materials Science
    • International Center for Materials Nanoarchitectonics and National Institute for Materials Science

  • Tony Low

    • University of Minnesota

  • Ke Wang

    • University of Minnesota