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arXiv · 1010.1574

Anomalous Surface Impedance due to Odd-frequency Cooper Pairs

Yasuhiro Asano·Alexander A. Golubov·Yakov V. Fominov·Yukio Tanaka
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Abstract

We discuss dynamical response of odd-frequency Cooper pairs to electromagnetic field. By using the quasiclassical Green function method, we calculate the surface impedance (Z=R-iX) of a normal metal thin film which covers a superconductor. In contrast to the standard relation (i.e., R << X), the surface impedance in spin-triplet proximity structures shows anomalous behavior (i.e., R>X) at low temperatures. This unusual relation is a result of the penetration of odd-frequency pairs into the normal metal and reflects the negative Cooper pair density.

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Yasuhiro Asano, Alexander A. Golubov, Yakov V. Fominov, Yukio Tanaka. 2011-08-24. Anomalous Surface Impedance due to Odd-frequency Cooper Pairs. https://doi.org/10.1103/physrevlett.107.087001

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