Surface Transport and Quantum Hall Effect in Ambipolar Black Phosphorus Double Quantum Wells

ORAL

Abstract

Quantum wells (QWs) is the most important class of devices in the study of two-dimensional (2D) systems. Here we demonstrate facile formation of black phosphorus-based wide QWs that host double layers of charge carriers. In contrast to tradition QWs, each 2D layer is ambipolar, and can be tuned into n-doped, p-doped or intrinsic regimes. Fully spin-polarized quantum Hall states are observed on each layer, with Land\'{e} $g$-factor that is attributed to exchange interactions. Our work opens the door for using 2D semiconductors as ambipolar single, double or wide QWs with unusual properties such as high anisotropy.

*FAME center; NSF/ECCS 1509958; National Science Foundation Cooperative Agreement No. DMR-1157490;

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Authors

  • Jiawei Yang

    • Univ of California - Riverside
    • University of California, Riverside

  • Son Tran

    • Univ of California - Riverside
    • University of California, Riverside

  • Nathaniel Gillgren

    • University of California, Riverside

  • Timothy Espiritu

    • University of California, Riverside

  • Yanmeng Shi

    • University of California, Riverside

  • Kenji Watanabe

    • National Institute for Materials Science

  • Takashi Taniguchi

    • National Institute for Materials Science

  • Seongphill Moon

    • National High Magnetic Field Laboratory

  • Hongwoo Baek

    • National High Magnetic Field Laboratory

  • Dmitry Smirnov

    • National High Magnetic Field Laboratory

  • Marc Bockrath

    • University of California, Riverside

  • Ruoyu Chen

    • University of California, Riverside

  • Chun Ning Lau

    • University of California, Riverside