Noise spectrum measurements in reentrant integer quantum Hall states

ORAL

Abstract

Two-dimensional electron gas (2DEG) system in strong magnetic field can host electron solid phases such as reentrant integer quantum Hall (RIQH) states in the second and higher Landau levels. Electron bubbles forming in RIQH states can be driven by an external electric field, providing a platform to study the dynamic collective behaviors. By performing noise spectrum measurements in a GaAs/AlGaAs 2DEG sample, we observed field-driven noise spectra in RIQH states including broad-band and narrow-band noise. Remarkably, unexpected dynamic ordering alternations of moving electron bubbles are revealed according to the noise patterns.

*The work was funded by NBRPC (2017YFA0303301), NSFC (11921005, 11674009), Gordon and Betty Moore Foundation (GBMF9615), and National Science Foundation (DMR-1420541).

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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
    • Leiden University

  • Yifan Li

    • International Center for Quantum Materials, Peking University

  • Yang Liu

    • International Center for Quantum Materials, Peking University

  • Loren Pfeiffer

    • Princeton University
    • Princeton Institute for the Science and Technology of Materials (PRISM), Princeton University
    • Department of Electrical Engineering, Princeton University
    • Electrical Engineering, Princeton
    • Electrical Engineering, Princeton University
    • Princeton

  • Ken W. West

    • Princeton University
    • Princeton Institute for the Science and Technology of Materials (PRISM), Princeton University
    • Department of Electrical Engineering, Princeton University
    • Electrical Engineering, Princeton
    • Electrical Engineering, Princeton University
    • Princeton

  • Pengjie Wang

    • Princeton University
    • Department of Physics, Princeton University

  • Xi Lin

    • International Center for Quantum Materials, Peking University
    • Peking Univ
    • International Center for Quantum Materials, School of Physics, Peking University
    • Peking University