Extracting linear and nonlinear conductivity tensors using angle resolved transport

ORAL

Abstract

The ability to examine the spatial anisotropy is central to our understanding of an electronic system. By probing transport properties with angular resolution, angle resolved transport measurement (ARTM) offers a powerful method to extract information of the spatial symmetry. Enabled by the new "sunflower" geometries, we use ARTM to determine both linear and nonlinear conductivity tensors from multiple samples. These conductivity tensors, which are generally inaccessible to the traditional Hall bar geometries, together offer an accurate description of the diffusive transport behavior across the samples up to second order in current. We show that the theoretical model is in excellent agreement with data, unlocking a new path towards a full characterization of the electronic anisotropy across the phase space of different graphene allotropes.

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Presenters

  • Naiyuan J Zhang

    • Brown University

Authors

  • Naiyuan J Zhang

    • Brown University

  • Dmitry V Chichinadze

    • National High Magnetic Field Laboratory

  • Jiang-Xiazi Lin

    • Brown University

  • Yibang B Wang

    • Brown University

  • Xiaoyu Wang

    • National High Magnetic Field Laboratory

  • 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

  • Jia Li

    • Brown University

  • Oskar Vafek

    • Florida State University