Hysteretic Charge Dynamics in RuCl3-doped Graphene Heterostructures

ORAL

Abstract

Heterostructures of van der Waals atomic layers could induce charge redistribution with nontrivial responses to external fields. Here we report hysteretic charging processes in graphene devices which are separated from remote α−RuCl3 acceptors by thin boron nitride spacers. The hysteretic gating responses of the graphene density develop below a threshold temperature and are attributed to charge trapping in α−RuCl3 that continuously tunes the electric polarization in the heterostructure. We study the time dynamics of the gating responses to characterize the charge trapping mechanism and discuss potential insights into the surface states of α−RuCl3.

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Presenters

  • Ziyu Liu

    • Columbia University

Authors

  • Ziyu Liu

    • Columbia University

  • Dihao Sun

    • Columbia University

  • Jordan Pack

    • Columbia University

  • David Mandrus

    • University of Tennessee

  • 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

  • Cory R Dean

    • Columbia Univ
    • Columbia University