Interfacial Ferroelectric Moments Probed by Hysteretic Transport in Graphene/hBN/α−RuCl3 Heterostructures

ORAL

Abstract

Understanding and engineering interface states are essential for the development of novel nano-electronic devices. An interfacial electric polarization can emerge across material heterojunctions and lead to a nontrivial response to external fields. Here we identify a tunable interfacial polarization in graphene/hBN/α−RuCl3 field effect devices through hysteretic transport measurements. The interfacial polarization originates from quantum mechanical exchange interactions, and do not involve any charge transfer across the interface. It can be manipulated by externally applied electric fields and behaves like a switchable ferroelectric moment. Our work unveils a novel route towards engineering ferroelectric like behavior in non-ferroelectric materials.

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Presenters

  • Ziyu Liu

    • Columbia University

Authors

  • Ziyu Liu

    • Columbia University

  • Emil V Boström

    • Max Planck Institute for the Structure & Dynamics of Matter
    • Max Planck Institute for the Structure and Dynamics of Matter

  • Dihao Sun

    • Columbia University

  • Jordan L Pack

    • Columbia University

  • David G Mandrus

    • University of Tennessee

  • Kenji Watanabe

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

  • Takashi Taniguchi

    • National Institute for Materials Science
    • International Center for Materials Nanoarchitectonics, National Institute for Materials Science
    • Research Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
    • International Center for Materials Nanoarchitectonics, National Institute of Material Science, Tsukuba, Japan
    • Advanced Materials Laboratory, National Institute for Materials Science

  • Angel Rubio

    • Max Planck Institute for the Structure & Dynamics of Matter
    • Max Planck Institute for the Structure & Dynamics of Matter; Flatiron Institute's Center for Computational Quantum Physics (CCQ) & Initiative for Computational Catalysis (ICC)

  • Cory R Dean

    • Columbia University