Thermoelectric Measurements on InAs/GaSb double Quantum Well

ORAL

Abstract

We performed thermoelectric measurement on InAs/GaSb double quantum well, in an attempt to observe thermal power and Nernst effect contributed by the helical edge channels. A new ``Semi-AC'' method was developed to conduct thermoelectric measurements for Hall bars with a size of $\sim$20 $\mu$m, which is more reliable in terms of determining charge carrier type compared with the 2-$\omega$ method. Furthermore, we will discuss thermoelectric signals under perpendicular magnetic field, in particular under Landau level quantization.

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Authors

  • Fan Yu

    • University of Michigan
    • Univ of Michigan - Ann Arbor
    • Department of Physics, University of Michigan, Ann Arbor, 450 Church Street, Ann Arbor, MI 48109

  • Tingxin Li

    • Rice University
    • Rice Univ

  • Ruiyuan Liu

    • Rice University

  • Gang Li

    • University of Michigan
    • Univ of Michigan - Ann Arbor
    • NHMFL-FSU

  • Ziji Xiang

    • University of Michigan
    • Univ of Michigan - Ann Arbor
    • Department of Physics, University of Michigan, Ann Arbor, 450 Church Street, Ann Arbor, MI 48109

  • Colin Tinsman

    • University of Michigan
    • Univ of Michigan - Ann Arbor

  • RuiRui Du

    • Rice University
    • Rice Univ
    • Peking Univ; Rice Univ

  • Lu Li

    • University of Michigan
    • Univ of Michigan - Ann Arbor
    • Department of Physics, University of Michigan, Ann Arbor, 450 Church Street, Ann Arbor, MI 48109