Anomalous Surface Impedance in a Normal-metal/Superconductor Junction with a Spin-active Interface

Abstract

We discuss the surface impedance (Z=R-iX) of a normal-metal/superconductor proximity structure taking into account the spin-dependent potential at the junction interface. Because of the spin mixing transport at the interface, odd-frequency spin-triplet s-wave Cooper pairs penetrate into the normal metal and cause the anomalous response to electromagnetic fields. At low temperature, the local impedance at a surface of the normal metal shows the nonmonotonic temperature dependence and the anomalous relation R>X. We also discuss a possibility of observing such anomalous impedance in experiments.

7pages, 7 figures

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Cited by in corpus (6)

• Effects of surface roughness on the paramagnetic response of small unconventional superconductors
• Odd-frequency pairing effect on the superfluid density and the Pauli spin susceptibility in spatially nonuniform spin-singlet superconductors
• Exciting odd frequency equal-spin-triplet correlations at metal-superconductor interfaces
• Spin imbalance in hybrid superconducting structures with spin-active interfaces
• Static and dynamic properties of Josephson weak links with singlet and triplet coupling
• Yu-Shiba-Rusinov bound states boost odd-frequency superconductivity