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Asymmetric edge supercurrents in MoTe2 Josephson junctions.
Chen, Pingbo; Wang, Jinhua; Wang, Gongqi; Ye, Bicong; Zhou, Liang; Wang, Le; Wang, Jiannong; Zhang, Wenqing; Chen, Weiqiang; Mei, Jiawei; He, Hongtao.
Affiliation
  • Chen P; Department of Physics, Harbin Institute of Technology Harbin 150001 China.
  • Wang J; Department of Physics, Southern University of Science and Technology Shenzhen 518055 China heht@sustech.edu.cn.
  • Wang G; Department of Physics, Southern University of Science and Technology Shenzhen 518055 China heht@sustech.edu.cn.
  • Ye B; Department of Physics, Southern University of Science and Technology Shenzhen 518055 China heht@sustech.edu.cn.
  • Zhou L; Department of Physics, Southern University of Science and Technology Shenzhen 518055 China heht@sustech.edu.cn.
  • Wang L; Department of Physics, The Hong Kong University of Science and Technology Clear Water Bay Hong Kong 999077 China.
  • Wang J; Department of Physics, Southern University of Science and Technology Shenzhen 518055 China heht@sustech.edu.cn.
  • Zhang W; Shenzhen Institute for Quantum Science and Engineering, Southern University of Science and Technology Shenzhen 518055 China.
  • Chen W; Department of Physics, The Hong Kong University of Science and Technology Clear Water Bay Hong Kong 999077 China.
  • Mei J; Department of Materials Science and Engineering, Southern University of Science and Technology Shenzhen 518055 China.
  • He H; Shenzhen Key Laboratory for Advanced Quantum Functional Materials and Devices, Southern University of Science and Technology Shenzhen 518055 China.
Nanoscale Adv ; 6(2): 690-696, 2024 Jan 16.
Article in En | MEDLINE | ID: mdl-38235086
ABSTRACT
To investigate the higher order topology in MoTe2, the supercurrent interference phenomena in Nb/MoTe2/Nb planar Josephson junctions have been systematically studied. By analyzing the obtained interference pattern of the critical supercurrents and performing a comparative study of the edge-touched and untouched junctions, it's found that the supercurrent is dominated by the edges, rather than the bulk or surfaces of MoTe2. An asymmetric Josephson effect with a field-tunable sign is also observed, indicating the nontrivial origin of the edge states. These results not only provide initial evidence for the hinge states in the higher order topological insulator MoTe2, but also demonstrate the potential applications of MoTe2-based Josephson junctions in rectifying the supercurrent.
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Full text: 1 Database: MEDLINE Language: En Year: 2024 Type: Article
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Full text: 1 Database: MEDLINE Language: En Year: 2024 Type: Article