Odd-parity superconductivity by competing spin-orbit coupling and orbital effect in artificial heterostructures

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Abstract

We show that odd-parity superconductivity occurs in multilayer Rashba systems without requiring spin-triplet Cooper pairs. A pairing interaction in the spin-singlet channel stabilizes the odd-parity pair-density-wave (PDW) state in the magnetic field parallel to the two-dimensional conducting plane. It is shown that the layer-dependent Rashba spin-orbit coupling and the orbital effect play essential roles for the PDW state in binary and tricolor heterostructures. We demonstrate that the odd-parity PDW state is a symmetry-protected topological superconducting state characterized by the one-dimensional winding number in the symmetry class BDI. The superconductivity in the artificial heavy-fermion superlattice CeCoIn[5]/YbCoIn[5] and bilayer interface SrTiO[3]/LaAlO[3] is discussed.

Journal

  • Physical Review B

    Physical Review B 92(17), 2015-11-02

    American Physical Society

Codes

  • NII Article ID (NAID)
    120005712927
  • NII NACSIS-CAT ID (NCID)
    AA11187113
  • Text Lang
    ENG
  • Article Type
    journal article
  • ISSN
    1098-0121
  • Data Source
    IR 
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