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Probing the mesoscopic size limit of quantum anomalous Hall insulators

Author

Listed:
  • Peng Deng

    (University of California Los Angeles)

  • Christopher Eckberg

    (Fibertek Inc
    US Army Research Laboratory
    US Army Research Laboratory)

  • Peng Zhang

    (University of California Los Angeles)

  • Gang Qiu

    (University of California Los Angeles)

  • Eve Emmanouilidou

    (Department of Physics and Astronomy, University of California Los Angeles)

  • Gen Yin

    (University of California Los Angeles)

  • Su Kong Chong

    (University of California Los Angeles)

  • Lixuan Tai

    (University of California Los Angeles)

  • Ni Ni

    (Department of Physics and Astronomy, University of California Los Angeles)

  • Kang L. Wang

    (University of California Los Angeles
    Department of Physics and Astronomy, University of California Los Angeles)

Abstract

The inelastic scattering length (Ls) is a length scale of fundamental importance in condensed matters due to the relationship between inelastic scattering and quantum dephasing. In quantum anomalous Hall (QAH) materials, the mesoscopic length scale Ls plays an instrumental role in determining transport properties. Here we examine Ls in three regimes of the QAH system with distinct transport behaviors: the QAH, quantum critical, and insulating regimes. Although the resistance changes by five orders of magnitude when tuning between these distinct electronic phases, scaling analyses indicate a universal Ls among all regimes. Finally, mesoscopic scaled devices with sizes on the order of Ls were fabricated, enabling the direct detection of the value of Ls in QAH samples. Our results unveil the fundamental length scale that governs the transport behavior of QAH materials.

Suggested Citation

  • Peng Deng & Christopher Eckberg & Peng Zhang & Gang Qiu & Eve Emmanouilidou & Gen Yin & Su Kong Chong & Lixuan Tai & Ni Ni & Kang L. Wang, 2022. "Probing the mesoscopic size limit of quantum anomalous Hall insulators," Nature Communications, Nature, vol. 13(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-31105-w
    DOI: 10.1038/s41467-022-31105-w
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    References listed on IDEAS

    as
    1. Tingxin Li & Shengwei Jiang & Bowen Shen & Yang Zhang & Lizhong Li & Zui Tao & Trithep Devakul & Kenji Watanabe & Takashi Taniguchi & Liang Fu & Jie Shan & Kin Fai Mak, 2021. "Quantum anomalous Hall effect from intertwined moiré bands," Nature, Nature, vol. 600(7890), pages 641-646, December.
    2. Xufeng Kou & Lei Pan & Jing Wang & Yabin Fan & Eun Sang Choi & Wei-Li Lee & Tianxiao Nie & Koichi Murata & Qiming Shao & Shou-Cheng Zhang & Kang L. Wang, 2015. "Metal-to-insulator switching in quantum anomalous Hall states," Nature Communications, Nature, vol. 6(1), pages 1-8, December.
    3. Huckestein, Bodo, 1990. "One-parameter scaling in the lowest Landau band," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 167(1), pages 175-187.
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    Cited by:

    1. Peng Deng & Peng Zhang & Christopher Eckberg & Su Kong Chong & Gen Yin & Eve Emmanouilidou & Xiaoyu Che & Ni Ni & Kang L. Wang, 2023. "Quantized resistance revealed at the criticality of the quantum anomalous Hall phase transitions," Nature Communications, Nature, vol. 14(1), pages 1-7, December.

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