Disorder-robust p-wave pairing with odd-frequency dependence in normal metal–conventional superconductor junctions

Tomas Löthman; Christopher Triola; Jorge Cayao; Annica M. Black-Schaffer

doi:10.1103/PhysRevB.104.094503

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Disorder-robust p-wave pairing with odd-frequency dependence in normal metal–conventional superconductor junctions

Tomas Löthman, Christopher Triola, Jorge Cayao, Annica M. Black-Schaffer

DOI 10.1103/PhysRevB.104.094503 · Physical Review B

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Abstract

We investigate the induced superconducting pair correlations in junctions between a conventional spin-singlet s-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 p-wave correlations are both significant in size and entirely robust against random nonmagnetic 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.