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Broad and colossal edge supercurrent in Dirac semimetal Cd3As2 Josephson junctions

Author

Listed:
  • Chun-Guang Chu

    (Peking University)

  • Jing-Jing Chen

    (Southern University of Science and Technology
    International Quantum Academy)

  • An-Qi Wang

    (Peking University)

  • Zhen-Bing Tan

    (Southern University of Science and Technology
    International Quantum Academy)

  • Cai-Zhen Li

    (Southern University of Science and Technology
    International Quantum Academy)

  • Chuan Li

    (University of Twente)

  • Alexander Brinkman

    (University of Twente)

  • Peng-Zhan Xiang

    (Peking University)

  • Na Li

    (Peking University)

  • Zhen-Cun Pan

    (Peking University)

  • Hai-Zhou Lu

    (Southern University of Science and Technology)

  • Dapeng Yu

    (Southern University of Science and Technology
    International Quantum Academy
    Hefei National Laboratory)

  • Zhi-Min Liao

    (Peking University
    Hefei National Laboratory)

Abstract

Edge supercurrent has attracted great interest recently due to its crucial role in achieving and manipulating topological superconducting states. Proximity-induced superconductivity has been realized in quantum Hall and quantum spin Hall edge states, as well as in higher-order topological hinge states. Non-Hermitian skin effect, the aggregation of non-Bloch eigenstates at open boundaries, promises an abnormal edge channel. Here we report the observation of broad edge supercurrent in Dirac semimetal Cd3As2-based Josephson junctions. The as-grown Cd3As2 nanoplates are electron-doped by intrinsic defects, which enhance the non-Hermitian perturbations. The superconducting quantum interference indicates edge supercurrent with a width of ~1.6 μm and a magnitude of ~1 μA at 10 mK. The wide and large edge supercurrent is inaccessible for a conventional edge system and suggests the presence of non-Hermitian skin effect. A supercurrent nonlocality is also observed. The interplay between band topology and non-Hermiticity is beneficial for exploiting exotic topological matter.

Suggested Citation

  • Chun-Guang Chu & Jing-Jing Chen & An-Qi Wang & Zhen-Bing Tan & Cai-Zhen Li & Chuan Li & Alexander Brinkman & Peng-Zhan Xiang & Na Li & Zhen-Cun Pan & Hai-Zhou Lu & Dapeng Yu & Zhi-Min Liao, 2023. "Broad and colossal edge supercurrent in Dirac semimetal Cd3As2 Josephson junctions," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-41815-4
    DOI: 10.1038/s41467-023-41815-4
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    References listed on IDEAS

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