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Chin. Phys. B, 2021, Vol. 30(7): 077406    DOI: 10.1088/1674-1056/ac0348
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Josephson current in an irradiated Weyl semimetal junction

Han Wang(王含)1 and Rui Shen(沈瑞)2,†
1 National Laboratory of Solid State Microstructures and School of Physics, Nanjing University, Nanjing 210093, China;
2 Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
Abstract  The influence of the off-resonant circularly polarized light on the Josephson current in the time-reversal broken superconducting Weyl semimetal junctions is investigated by using the Bogoliubov-de Gennes equation and the transfer matrix approach. Both the zero momentum BCS pairing states and the finite momentum Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) pairing states are considered for the Weyl superconductors. When a circularly polarized light is applied, it is shown that the current phase relation remains unchanged for the BCS pairing with the increasing of incident radiation intensity A0. For FFLO pairing, the Josephson current exhibits the 0-π transition and periodic oscillation as a function of A0. The dependence of free energy and critical current on A0 are also investigated.
Keywords:  Weyl semimetal      Josephson junction      FFLO pairing  
Received:  07 April 2021      Revised:  09 May 2021      Accepted manuscript online:  20 May 2021
PACS:  73.23.-b (Electronic transport in mesoscopic systems)  
  74.20.-z (Theories and models of superconducting state)  
  74.50.+r (Tunneling phenomena; Josephson effects)  
Fund: Project supported by the National Key Research and Development Program of China (Grant No. 2017YFA0303203) and the National Natural Science Foundation of China (Grant No. 11474149).
Corresponding Authors:  Rui Shen     E-mail:  shen@nju.edu.cn

Cite this article: 

Han Wang(王含) and Rui Shen(沈瑞) Josephson current in an irradiated Weyl semimetal junction 2021 Chin. Phys. B 30 077406

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