Extracting linear and nonlinear conductivity tensors using angle resolved transport

ORAL

Abstract

Measuring electrical transport with angular resolution is a powerful experimental tool to extract information about linear and nonlinear conductivity tensor of the material. The extraction procedure is complicated by the geometric effects, which alter the readout of the potential drop on contacts. We present a theory of linear and nonlinear transport with angular resolution in sunflower geometry up to quadratic order in injected current. We provide analytical solutions for the linear and nonlinear components of electrostatic potential, which accommodate the effects of sample geometry. This allows us to extract all components of linear and nonlinear conductivity tensor and analyze whether the currents in the sample are dissipative (Ohmic) or non-dissipative (Hall-like).

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Publication: Preprint in preparation

Presenters

  • Dmitry V Chichinadze

    • National High Magnetic Field Laboratory

Authors

  • Dmitry V Chichinadze

    • National High Magnetic Field Laboratory

  • Naiyuan J Zhang

    • Brown University

  • 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