arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2004.01456cond-mat.supr-concond-mat.mes-hall
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正常金属-常规超导体结中具有奇频率依赖的无序鲁棒$p$波配对

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

摘要:

研究了自旋单重态$s$波超导体与无序金属结中的超导对关联。基于其在时域中的对称性分解的对振幅,我们证明了奇时间,或等效的奇频率,自旋单线态$p$ -波相关性都是显着的大小和完全鲁棒性对随机非磁性无序。我们发现,这些奇频相关性甚至可以由无序产生。我们的研究结果表明,各向异性奇频配对代表了无序超导混合结构中的邻近诱导关联的重要部分。

英文摘要:

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 represent an important fraction of the proximity-induced correlations in disordered superconducting hybrid structures.

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