Unconventional surface impedance of a normal-metal film covering a spin-triplet superconductor due to odd-frequency cooper pairs |
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| Authors: | Asano Yasuhiro Golubov Alexander A Fominov Yakov V Tanaka Yukio |
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| Institution: | Department of Applied Physics and Center for Topological Science & Technology, Hokkaido University, Sapporo 060-8628, Japan. |
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| Abstract: | We discuss the dynamic response of odd-frequency Cooper pairs to an electromagnetic field. By using the quasiclassical Green function method, we calculate the impedance (Z=R-iX) of a normal-metal thin film which covers a superconductor. In contrast with the standard relation (i.e., R?X), the impedance in spin-triplet proximity structures shows anomalous behavior (i.e., R>X) in the low frequency limit. 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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