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

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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… Click to show full 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 non-magnetic disorder. We find that these odd-frequency correlations can even be generated by disorder. Our results show that anisotropic odd-frequency pairing plays a significant role in disordered superconducting hybrid structures.

Keywords: odd frequency; frequency; superconductor; wave; disorder robust; normal metal

Journal Title: Physical Review B
Year Published: 2021

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