Realization of Time Reversal Breaking Topological d + id′ Superconductivity by Proximity Effect

ORAL

Abstract

We show that it is inevitable that time reversal symmetry breaks in a superconducting tunneling junction formed by two superconductors with different pairing symmetries. While the leading conventional Jospheson coupling vanishes in such a junction, the forth order in tunneling always generate chiral superconductivity (SC) orders with broken time reversal symmetry. The topology of all possible TRB SC orders are analyzed and only the d + id′ order has a nonzero Chern number. The self-consistent mean field calculation is deployed on two layered t − J model to justify our viewpoints. A robust d ± id′ order appears in our setup.

*The work is supported by the Ministry of Sci- ence and Technology of China 973 program(Grant No. 2012CV821400), National Science Foundation of China (Grant No. NSFC-1190024, 91536108 and 11104339), and the Strategic Priority Research Program of CAS (Grant No. XDB07000000 and XDB01010000).

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Presenters

  • Zhesen Yang

    • Chinese Academy of Scienes (CAS)

Authors

  • Zhesen Yang

    • Chinese Academy of Scienes (CAS)

  • Shengshan Qin

    • Institute of Physics,Chinese Academy of Sciences
    • Chinese Academy of Scienes (CAS)

  • Qiang Zhang

    • Chinese Academy of Scienes (CAS)

  • Chen Fang

    • Physics, Chinese Academy of Sciences (CAS)
    • Chinese Academy of Scienes (CAS)
    • Institute of Physics,Chinese Academy of Scienes (CAS)
    • Institute of Physics, Chinese Academy of Sciences

  • Jiangping Hu

    • Institute of Physics,Chinese Academy of Sciences
    • Institute of Physics, Chinese Academy of Sciences
    • Chinese Academy of Scienes (CAS)
    • Institute of Physics, Chinese Academy of Scienes (CAS)