Inducing transport-anisotropy in graphene with 1D superlattices

ORAL

Abstract

Graphene devices subjected to one-dimensional periodic superlattice potential have been studied extensively over the last decade. Previous experimental studies on such systems interpreted their data in fundamentally different ways: either based on commensurate effects such as Fabry-Perot interference, or a band structure based picture. Here we exploit our recently developed technique of dielectric superlattices to pattern graphene with a 1D superlattice, with periodicity as low as as low as 55nm. We observe strong anisotropy in electrical transport features along directions parallel versus perpendicular to the SL basis vector. For transport parallel to the SL basis vector, we see features consistent with Fabry-Perot interference at zero magnetic field, and Hoftstader butterfly-like features at high field that suggest band structure modifications. Possible interplay between commensurability effects and band structure modifications in such systems are discussed.

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Presenters

  • Yutao Li

    • Columbia University

Authors

  • Yutao Li

    • Columbia University

  • Scott A Dietrich

    • Columbia University

  • Carlos Forsythe

    • Columbia University

  • Shaowen Chen

    • Department of Physics, Columbia University
    • Columbia University
    • Applied Physics and Math Department, Columbia University

  • Takashi Taniguchi

    • Advanced Materials Laboratory, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
    • National Institute for Materials Science, Japan
    • National Institute for Materials Science (Japan)
    • National Institute for Materials Science
    • NIMS
    • Kyoto University
    • National Institute for Materials Science, Namiki 1-1, Tsukuba, Ibaraki 305-0044, Japan.
    • National Institute of Materials Science

  • Kenji Watanabe

    • National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305 0044, Japan
    • Advanced Materials Laboratory, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
    • National Institute for Materials Science
    • Advanced Materials Laboratory, National Institute for Materials Science, , 1-1 Namiki, Tsukuba 305-0044, Japan
    • National Institute for Material Science, 1-1 Namiki, Tsukuba 305-0044
    • National Institute of Materials Science
    • NIMS, Japan
    • Advanced Materials Laboratory, NIMS
    • National Institute for Materials Science, Tsukuba, Japan
    • National Institute for Materials Science, Japan
    • Advanced Materials Laboratory, National Institute for Materials Science
    • National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
    • National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0044, Japan
    • National Institute for Materials Science (NIMS)
    • NIMS Tsukuba
    • National Institute for Materials Science (Japan)
    • NIMS
    • National Institute for Material Science
    • National Institute for Materials Science, 1-1 Namiki, Tsukuba, Japan
    • National Institute for Materials Science , Japan
    • National Institute for Materials Science, Namiki 1-1, Tsukuba, Ibaraki 305-0044, Japan.
    • Advanced Materials Laboratory, National Institute for Materials Science, Japan
    • Advanced Materials Laboratory, National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan
    • National Institute for Materials Science, Tsukuba, Ibaraki 305- 0044, Japan
    • National Institute for Material Science - Japan
    • National Institute for Materials Science, Namiki Tsukuba Ibaraki, Japan
    • National Institute of Material Science
    • Advanced Material Lab, NIMS
    • Advanced Materials Laboratory, National Institute for Materials Science, Tsukuba, Japan
    • Advanced Materials Laboratory, National Institute for Materials Science, Tsukuba, Ibaraki, Japan
    • National Institute for Materials Science, Tsukuba
    • 1-1 Namiki, Tsukuba, National Institute for Materials Science
    • NIMS/Tsukuba
    • National Institute for Materials Science, 1-1 Namiki, Tsukuba, 305-0044 Japan
    • National Institute for Materials Science, Namiki, 305-0044, Japan
    • National Institute for Material Science, Japan
    • Advanced Materials Laboratory, NIMS, Japan
    • Columbia University
    • Advanced Materials Labaratory, National Institute for Materials Science
    • National Institute of Material Science, 1-1 Namiki, Tsukuba, Ibaraki 205-0044, Japan
    • National Institute of Materials Science, Japan

  • James Hone

    • Columbia University
    • Mechanics, Columbia University
    • Department of Mechanical Engineering, Columbia University in the City of New York
    • Department of Mechanical Engineering, Columbia University
    • Department of Mechanical Engineering, Columbia University, New York, NY 10027 USA
    • Mechanical Engineering, Columbia University

  • Cory Dean

    • Columbia University
    • Department of Physics, Columbia University