Non-linear transport and noise measurements in reentrant integer quantum Hall states

ORAL

Abstract

Two-dimensional electron gas (2DEG) system in strong magnetic field is an ideal platform to explore interesting physics such as reentrant integer quantum Hall (RIQH) effect in second and higher Landau levels. We have carried out non-linear transport and noise measurements in ultra-high mobility GaAs/AlGaAs 2DEG to study RIQH states in Corbino-geometry samples. By increasing the DC bias gradually, we found the insulating phase of RIQH states disappeared, and the depinning trace can be divided into three regions according to different DC bias values. The narrow-band noise only appears in the middle region.

*The work was funded by NBRPC (2017YFA0303301), NSFC (11674009), Gordon and Betty Moore Foundation (GBMF4420), National Science Foundation (DMR-1420541) and Keck Foundation.

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Presenters

  • Jian Sun

    • International Center for Quantum Materials, Peking University

Authors

  • Jian Sun

    • International Center for Quantum Materials, Peking University

  • Jiasen Niu

    • International Center for Quantum Materials, Peking University

  • Pengjie Wang

    • Princeton University
    • Department of Physics, Princeton University

  • Yang Liu

    • Peking Univ
    • Peking University
    • International Center for Quantum Materials, Peking University

  • Loren Pfeiffer

    • Princeton University
    • Electrical Engineering, Princeton University
    • Electrical engineering, Princeton university
    • Princeton Univ
    • Department of Electrical Engineering, Princeton University
    • electrical engineering, Princeton
    • Department of Electrical Engineering, Princeton University, Princeton, NJ, 08544, USA

  • Kenneth West

    • Princeton University
    • Electrical Engineering, Princeton University
    • Electrical engineering, Princeton university
    • Princeton Univ
    • Department of Electrical Engineering, Princeton University
    • electrical engineering, Princeton
    • Department of Electrical Engineering, Princeton University, Princeton, NJ, 08544, USA

  • Xi Lin

    • International Center for Quantum Materials, Peking University