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