1204.4012 (Yasuhiro Asano et al.)

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

Yasuhiro Asano, Masahiro Ozaki, Tetsuro Habe, Alexander A. Golubov, Yukio Tanaka

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.

View original: http://arxiv.org/abs/1204.4012