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

Research output: Contribution to journalArticleAcademicpeer-review

52 Citations (Scopus)

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 languageEnglish
Article number087001
Pages (from-to)-
Number of pages4
JournalPhysical review letters
Volume107
Issue number8
DOIs
Publication statusPublished - 2011

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metal films
coverings
impedance
dynamic response
metals
proximity
electromagnetic fields
Green's functions
penetration
low frequencies
thin films

Keywords

  • METIS-280331
  • IR-104387

Cite this

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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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Unconventional Surface Impedance of a Normal-Metal Film Covering a Spin-Triplet Superconductor Due to Odd-Frequency Cooper Pairs. / Asano, Yasuhiro; Golubov, Alexandre Avraamovitch; Fominov, I.V.; Fominov, Yakov V.; Tanaka, Yukio.

In: Physical review letters, Vol. 107, No. 8, 087001, 2011, p. -.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Unconventional Surface Impedance of a Normal-Metal Film Covering a Spin-Triplet Superconductor Due to Odd-Frequency Cooper Pairs

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

U2 - 10.1103/PhysRevLett.107.087001

DO - 10.1103/PhysRevLett.107.087001

M3 - Article

VL - 107

SP - -

JO - Physical review letters

JF - Physical review letters

SN - 0031-9007

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