• 文献标题:   Light-modulated Josephson effect in Kekule patterned graphene
  • 文献类型:   Article
  • 作  者:   ZENG W, SHEN R
  • 作者关键词:  
  • 出版物名称:   PHYSICAL REVIEW B
  • ISSN:   2469-9950 EI 2469-9969
  • 通讯作者地址:  
  • 被引频次:   4
  • DOI:   10.1103/PhysRevB.105.094510
  • 出版年:   2022

▎ 摘  要

We theoretically study the Josephson effect in a superconductor/normal metal/superconductor junction based on Kekule patterned graphene. For the Kekule-O patterned junctions, a Fermi momentum-splitting Andreev reflection at the interface can be induced by the off-resonant circularly polarized light applied in the normal region, which results in the possible pi state. In contrast, for the Kekule-Y patterned junctions, the Fermi momentum-splitting Andreev reflection is strongly suppressed due to the valley-momentum locking, and the junction always exhibits the 0 state. The dependence of the critical current on the junction length and the illumination parameter of the light field is also presented in detail.