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Evolution of Weyl orbit and quantum Hall effect in Dirac semimetal Cd3As2

Author

Listed:
  • Cheng Zhang

    (Fudan University
    Collaborative Innovation Center of Advanced Microstructures)

  • Awadhesh Narayan

    (Trinity College
    University of Illinois at Urbana-Champaign)

  • Shiheng Lu

    (Fudan University
    Collaborative Innovation Center of Advanced Microstructures)

  • Jinglei Zhang

    (Chinese Academy of Sciences)

  • Huiqin Zhang

    (Fudan University
    Collaborative Innovation Center of Advanced Microstructures)

  • Zhuoliang Ni

    (Fudan University
    Collaborative Innovation Center of Advanced Microstructures)

  • Xiang Yuan

    (Fudan University
    Collaborative Innovation Center of Advanced Microstructures)

  • Yanwen Liu

    (Fudan University
    Collaborative Innovation Center of Advanced Microstructures)

  • Ju-Hyun Park

    (National High Magnetic Field Laboratory)

  • Enze Zhang

    (Fudan University
    Collaborative Innovation Center of Advanced Microstructures)

  • Weiyi Wang

    (Fudan University
    Collaborative Innovation Center of Advanced Microstructures)

  • Shanshan Liu

    (Fudan University
    Collaborative Innovation Center of Advanced Microstructures)

  • Long Cheng

    (Chinese Academy of Sciences)

  • Li Pi

    (Chinese Academy of Sciences)

  • Zhigao Sheng

    (Chinese Academy of Sciences)

  • Stefano Sanvito

    (Trinity College)

  • Faxian Xiu

    (Fudan University
    Collaborative Innovation Center of Advanced Microstructures
    Fudan University)

Abstract

Owing to the coupling between open Fermi arcs on opposite surfaces, topological Dirac semimetals exhibit a new type of cyclotron orbit in the surface states known as Weyl orbit. Here, by lowering the carrier density in Cd3As2 nanoplates, we observe a crossover from multiple-frequency to single-frequency Shubnikov–de Haas (SdH) oscillations when subjected to out-of-plane magnetic field, indicating the dominant role of surface transport. With the increase of magnetic field, the SdH oscillations further develop into quantum Hall state with non-vanishing longitudinal resistance. By tracking the oscillation frequency and Hall plateau, we observe a Zeeman-related splitting and extract the Landau level index as well as sub-band number. Different from conventional two-dimensional systems, this unique quantum Hall effect may be related to the quantized version of Weyl orbits. Our results call for further investigations into the exotic quantum Hall states in the low-dimensional structure of topological semimetals.

Suggested Citation

  • Cheng Zhang & Awadhesh Narayan & Shiheng Lu & Jinglei Zhang & Huiqin Zhang & Zhuoliang Ni & Xiang Yuan & Yanwen Liu & Ju-Hyun Park & Enze Zhang & Weiyi Wang & Shanshan Liu & Long Cheng & Li Pi & Zhiga, 2017. "Evolution of Weyl orbit and quantum Hall effect in Dirac semimetal Cd3As2," Nature Communications, Nature, vol. 8(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_s41467-017-01438-y
    DOI: 10.1038/s41467-017-01438-y
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