Anomalous Surface Impedance due to Odd-frequency Cooper Pairs

Details Anomalous Surface Impedance due to Odd-frequency Cooper Pairs Anomalous Surface Impedance due to Odd-frequency Cooper Pairs

2010-10-08

arxiv.org/abs/1010.1574v2

Physical Review Letters 107, 087001 (2011)

Physics

Condensed Matter

Superconductivity

5 pages, 3 figures embeded

Scientific paper

10.1103/PhysRevLett.107.087001

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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