Unconventional Surface Impedance of a Normal-Metal Film Covering a Spin-Triplet Superconductor Due to Odd-Frequency Cooper Pairs

Yasuhiro Asano; Alexandre Avraamovitch Golubov; I.V. Fominov; Yakov V. Fominov; Yukio Tanaka

doi:10.1103/PhysRevLett.107.087001

Unconventional Surface Impedance of a Normal-Metal Film Covering a Spin-Triplet Superconductor Due to Odd-Frequency Cooper Pairs

Yasuhiro Asano, Alexandre Avraamovitch Golubov, I.V. Fominov, Yakov V. Fominov, Yukio Tanaka

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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.

Original language	English
Article number	087001
Pages (from-to)	-
Number of pages	4
Journal	Physical review letters
Volume	107
Issue number	8
DOIs	https://doi.org/10.1103/PhysRevLett.107.087001
Publication status	Published - 2011

Keywords

METIS-280331
IR-104387

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10.1103/PhysRevLett.107.087001

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title = "Unconventional Surface Impedance of a Normal-Metal Film Covering a Spin-Triplet Superconductor Due to Odd-Frequency Cooper Pairs",

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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AU - Asano, Yasuhiro

AU - Golubov, Alexandre Avraamovitch

AU - Fominov, I.V.

AU - Fominov, Yakov V.

AU - Tanaka, Yukio

PY - 2011

Y1 - 2011

N2 - 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.

AB - 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.

KW - METIS-280331

KW - IR-104387

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DO - 10.1103/PhysRevLett.107.087001

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VL - 107

SP - -

JO - Physical review letters

JF - Physical review letters

IS - 8

M1 - 087001

ER -

Unconventional Surface Impedance of a Normal-Metal Film Covering a Spin-Triplet Superconductor Due to Odd-Frequency Cooper Pairs

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