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Magnetic field filtering of the boundary supercurrent in unconventional metal NiTe2-based Josephson junctions

Author

Listed:
  • Tian Le

    (Chinese Academy of Sciences)

  • Ruihan Zhang

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Changcun Li

    (University of Electronic Science and Technology of China)

  • Ruiyang Jiang

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Haohao Sheng

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Linfeng Tu

    (Chinese Academy of Sciences
    Nankai University)

  • Xuewei Cao

    (Nankai University)

  • Zhaozheng Lyu

    (Chinese Academy of Sciences
    Hefei National Laboratory)

  • Jie Shen

    (Chinese Academy of Sciences
    Songshan Lake Materials Laboratory)

  • Guangtong Liu

    (Chinese Academy of Sciences
    Hefei National Laboratory
    Songshan Lake Materials Laboratory)

  • Fucai Liu

    (University of Electronic Science and Technology of China
    University of Electronic Science and Technology of China)

  • Zhijun Wang

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Li Lu

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences
    Hefei National Laboratory
    Songshan Lake Materials Laboratory)

  • Fanming Qu

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences
    Hefei National Laboratory
    Songshan Lake Materials Laboratory)

Abstract

Topological materials with boundary (surface/edge/hinge) states have attracted tremendous research interest. Additionally, unconventional (obstructed atomic) materials have recently drawn lots of attention owing to their obstructed boundary states. Experimentally, Josephson junctions (JJs) constructed on materials with boundary states produce the peculiar boundary supercurrent, which was utilized as a powerful diagnostic approach. Here, we report the observations of boundary supercurrent in NiTe2-based JJs. Particularly, applying an in-plane magnetic field along the Josephson current can rapidly suppress the bulk supercurrent and retain the nearly pure boundary supercurrent, namely the magnetic field filtering of supercurrent. Further systematic comparative analysis and theoretical calculations demonstrate the existence of unconventional nature and obstructed hinge states in NiTe2, which could produce hinge supercurrent that accounts for the observation. Our results reveal the probable hinge states in unconventional metal NiTe2, and demonstrate in-plane magnetic field as an efficient method to filter out the bulk contributions and thereby to highlight the hinge states hidden in topological/unconventional materials.

Suggested Citation

  • Tian Le & Ruihan Zhang & Changcun Li & Ruiyang Jiang & Haohao Sheng & Linfeng Tu & Xuewei Cao & Zhaozheng Lyu & Jie Shen & Guangtong Liu & Fucai Liu & Zhijun Wang & Li Lu & Fanming Qu, 2024. "Magnetic field filtering of the boundary supercurrent in unconventional metal NiTe2-based Josephson junctions," Nature Communications, Nature, vol. 15(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-47103-z
    DOI: 10.1038/s41467-024-47103-z
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