Yu-Shiba-Rusinov bound states boost odd-frequency superconductivity
arXiv:2207.05786 · doi:10.1016/j.physe.2024.116127
Abstract
We predict that the occurence of zero energy Yu-Shiba-Rusinov(YSR) bound states in two different setups, metal-spin flipper-metal-s-wave superconductor () and superconductor-metal-spin flipper-metal-superconductor () junctions, can generate multi-fold enhancement of surface-induced odd-frequency superconductivity. On the other hand, in the absence of these bound states, even-frequency superconductivity dominates. Specifically, in a Josephson junction, the emergence of zero energy YSR bound states leads to a junction transition and surface odd-frequency superconductivity dominance. Notably, odd-frequency superconductivity vanishes in the absence of YSR-bound states. Interestingly, the equal spin-triplet pairing is the dominant component in the surface induced odd-frequency superconductivity in both setups, which could have important implications for superconducting spintronics. Overall, our findings may help to detect the presence of YSR-bound states through the observation of surface induced odd-frequency superconductivity and contribute to a better understanding of their relationship.
24 pages, 14 figures, accepted for publication in Physica E: Low-dimensional Systems and Nanostructures (2024)
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