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

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-frequenc...

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Bibliographic Details
Published in:Physical review. B 2021-09, Vol.104 (9), p.1, Article 094503
Main Authors: Löthman, Tomas, Triola, Christopher, Cayao, Jorge, Black-Schaffer, Annica M.
Format: Article
Language:English
Subjects:
Correlation
Hybrid structures
P waves
Robustness
Superconductivity
Superconductor junctions
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Summary: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.
ISSN:2469-9950
2469-9969
2469-9969
DOI:10.1103/PhysRevB.104.094503