Improved p-type Contact to WSe2 Using a α-RuCl3 Charge-Transfer Interface

ORAL

Abstract

A lack of reliable, ohmic contacts at low temperatures has been a barrier to studying the transport properties of semiconducting transition metal dichalcogenide heterostructures, particularly in the monolayer limit. Here we demonstrate a charge-transfer doping scheme, using α-RuCl3 as a strong electron acceptor, for realizing transparent contact to monolayer WSe2. Hole densities in the contact region as large as 3.2×1013 cm-2 can be achieved, resulting in contact resistances as low as 1.7 kΩ μm. Device architectures that combine high transparency contacts with independent tunning of the channel density will be discussed.

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Presenters

  • Jordan Pack

    • Columbia University

Authors

  • Jordan Pack

    • Columbia University

  • Yinjie Guo

    • Columbia University
    • Columbia Unviersity

  • Ziyu Liu

    • Columbia University

  • Bjarke S Jessen

    • Columbia University

  • Song Liu

    • Columbia University

  • Luke N Holtzman

    • Columbia University

  • Jiaqiang Yan

    • Oak Ridge National Laboratory
    • Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA

  • Kenji Watanabe

    • National Institute for Materials Science
    • Research Center for Functional Materials, National Institute of Materials Science
    • Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-044, Japan
    • NIMS
    • Research Center for Functional Materials, National Institute for Materials Science
    • National Institute for Materials Science, Japan
    • Research Center for Functional Materials, National Institute for Materials Science, Tsukuba, Japan
    • NIMS Japan

  • Takashi Taniguchi

    • National Institute for Materials Science
    • Kyoto Univ
    • International Center for Materials Nanoarchitectonics, National Institute of Materials Science
    • Kyoto University
    • International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-044, Japan
    • International Center for Materials Nanoarchitectonics, National Institute for Materials Science
    • National Institute for Materials Science, Japan
    • National Institute For Materials Science
    • NIMS
    • National Institute for Material Science
    • International Center for Materials Nanoarchitectonics, National Institute for Materials Science, Tsukuba, Japan
    • NIMS Japan

  • David G Mandrus

    • University of Tennessee
    • Oak Ridge National Laboratory

  • James C Hone

    • Columbia University

  • Cory R Dean

    • Columbia Univ
    • Columbia University