Disorder-robust -wave pairing with odd frequency dependence in normal metal-conventional superconductor junctions
arXiv:2004.01456 · doi:10.1103/PhysRevB.104.094503
Abstract
We investigate the induced superconducting pair correlations in junctions between a conventional spin-singlet -wave superconductor and a disordered normal metal. Decomposing the pair amplitude based on its symmetries in the time domain, we demonstrate that the odd-time, or equivalently odd-frequency, spin-singlet -wave correlations are both significant in size and entirely robust against random non-magnetic disorder. We find that these odd-frequency correlations can even be generated by disorder. Our results show that anisotropic odd-frequency pairing represent an important fraction of the proximity-induced correlations in disordered superconducting hybrid structures.
arXiv comment7 pages, 4 figures + 7 pages supplemental material, 4 figures. Published version
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