Anomalous Surface Impedance due to Odd-frequency Cooper Pairs

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.

5 pages, 3 figures embeded

References in corpus (6)

• A spin triplet supercurrent through the half-metallic ferromagnet CrO2
• Theory of the proximity effect in junctions with unconventional superconductors
• Odd-frequency pairing in normal metal/superconductor junctions
• Anomalous Josephson effect in p-wave dirty junctions
• Pairing symmetry conversion by spin-active interfaces in superconducting junctions
• Conductance of a junction between a normal metal and a Berezinskii superconductor

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