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

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

2012-04-18

arxiv.org/abs/1204.4012v1

Physics

Condensed Matter

Superconductivity

7pages, 7 figures

Scientific paper

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.

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