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Chin. Phys. B, 2022, Vol. 31(5): 057402    DOI: 10.1088/1674-1056/ac5d30
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Asymmetric Fraunhofer pattern in Josephson junctions from heterodimensional superlattice V5S8

Juewen Fan(范珏雯)1, Bingyan Jiang(江丙炎)1, Jiaji Zhao(赵嘉佶)1, Ran Bi(毕然)1, Jiadong Zhou(周家东)2, Zheng Liu(刘政)3, Guang Yang(杨光)4, Jie Shen(沈洁)4, Fanming Qu(屈凡明)4, Li Lu(吕力)4, Ning Kang(康宁)5, and Xiaosong Wu(吴孝松)1,6,7,†
1 State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, Frontiers Science Center for Nano-optoelectronics, Peking University, Beijing 100871, China;
2 Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement (Ministry of Education), Beijing Key Laboratory of Nanophotonics & Ultrafine Optoelectronic Systems, and School of Physics, Beijing Institute of Technology, Beijing 100081, China;
3 School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore;
4 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
5 Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics, Peking University, Beijing 100871, China;
6 Collaborative Innovation Center of Quantum Matter, Beijing 100871, China;
7 Shenzhen Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
Abstract  Introduction of spin-orbit coupling (SOC) in a Josephson junction (JJ) gives rise to unusual Josephson effects. We investigate JJs based on a newly discovered heterodimensional superlattice V5S8 with a special form of SOC. The unique homointerface of our JJs enables elimination of extrinsic effects due to interfaces and disorder. We observe asymmetric Fraunhofer patterns with respect to both the perpendicular magnetic field and the current. The asymmetry is influenced by an in-plane magnetic field. Analysis of the pattern points to a nontrivial spatial distribution of the Josephson current that is intrinsic to the SOC in V5S8.
Keywords:  Fraunhofer pattern      Josephson junction      spin-orbit coupling      homointerface  
Received:  29 January 2022      Revised:  01 March 2022      Accepted manuscript online: 
PACS:  74.50.+r (Tunneling phenomena; Josephson effects)  
  74.45.+c (Proximity effects; Andreev reflection; SN and SNS junctions)  
  03.75.Lm (Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations)  
  71.70.Ej (Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect)  
Fund: Project supported by the National Key Basic Research Program of China (Grant No.2016YFA0300600) and the National Natural Science Foundation of China (Grant Nos.11574005 and 11774009).
Corresponding Authors:  Xiaosong Wu,E-mail:xswu@pku.edu.cn     E-mail:  xswu@pku.edu.cn
About author:  2022-3-14

Cite this article: 

Juewen Fan(范珏雯), Bingyan Jiang(江丙炎), Jiaji Zhao(赵嘉佶), Ran Bi(毕然), Jiadong Zhou(周家东), Zheng Liu(刘政), Guang Yang(杨光), Jie Shen(沈洁), Fanming Qu(屈凡明), Li Lu(吕力), Ning Kang(康宁), and Xiaosong Wu(吴孝松) Asymmetric Fraunhofer pattern in Josephson junctions from heterodimensional superlattice V5S8 2022 Chin. Phys. B 31 057402

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