Ubiquitous presence of 0dd-frequency pairing state in superconducting junctions

Alexandre Avraamovitch Golubov, Y. Tanaka, S. Kashiwaya, M. Ueda

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

We predict generation of the odd-frequency pairing state near interfaces in conventional even-frequency superconductors. Using the quasiclassical Green's function formalism, we show that the pair amplitude can be decomposed into even and odd-frequency components. We demonstrate that, quite generally, the spin-singlet even-parity (spin-triplet odd-parity) pair potential in a superconductor induces the odd-frequency pairing component with spin-singlet odd-parity (spin-triplet even-parity) near interfaces. The magnitude of the induced odd-frequency component is enhanced in the presence of the midgap Andreev resonant state due to the sign change of the anisotropic pair potential at the interface. The Josephson effect should therefore occur between odd- and even-frequency superconductors, contrary to the standard wisdom. A method to probe the odd-frequency superconductors is proposed.
Original languageUndefined
Pages (from-to)163-
JournalPhysica E
Volume40
Issue number1
DOIs
Publication statusPublished - 2007

Keywords

  • METIS-243144
  • IR-75083

Cite this

Golubov, Alexandre Avraamovitch ; Tanaka, Y. ; Kashiwaya, S. ; Ueda, M. / Ubiquitous presence of 0dd-frequency pairing state in superconducting junctions. In: Physica E. 2007 ; Vol. 40, No. 1. pp. 163-.
@article{fdd44a126d0a4f558c78438a0ec9675a,
title = "Ubiquitous presence of 0dd-frequency pairing state in superconducting junctions",
abstract = "We predict generation of the odd-frequency pairing state near interfaces in conventional even-frequency superconductors. Using the quasiclassical Green's function formalism, we show that the pair amplitude can be decomposed into even and odd-frequency components. We demonstrate that, quite generally, the spin-singlet even-parity (spin-triplet odd-parity) pair potential in a superconductor induces the odd-frequency pairing component with spin-singlet odd-parity (spin-triplet even-parity) near interfaces. The magnitude of the induced odd-frequency component is enhanced in the presence of the midgap Andreev resonant state due to the sign change of the anisotropic pair potential at the interface. The Josephson effect should therefore occur between odd- and even-frequency superconductors, contrary to the standard wisdom. A method to probe the odd-frequency superconductors is proposed.",
keywords = "METIS-243144, IR-75083",
author = "Golubov, {Alexandre Avraamovitch} and Y. Tanaka and S. Kashiwaya and M. Ueda",
note = "Proceedings of the International Workshop on Quantum Coherence, Noise and Decoherence in Nanostructures",
year = "2007",
doi = "10.1016/j.physe.2007.05.004",
language = "Undefined",
volume = "40",
pages = "163--",
journal = "Physica E",
issn = "1386-9477",
publisher = "Elsevier",
number = "1",

}

Ubiquitous presence of 0dd-frequency pairing state in superconducting junctions. / Golubov, Alexandre Avraamovitch; Tanaka, Y.; Kashiwaya, S.; Ueda, M.

In: Physica E, Vol. 40, No. 1, 2007, p. 163-.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Ubiquitous presence of 0dd-frequency pairing state in superconducting junctions

AU - Golubov, Alexandre Avraamovitch

AU - Tanaka, Y.

AU - Kashiwaya, S.

AU - Ueda, M.

N1 - Proceedings of the International Workshop on Quantum Coherence, Noise and Decoherence in Nanostructures

PY - 2007

Y1 - 2007

N2 - We predict generation of the odd-frequency pairing state near interfaces in conventional even-frequency superconductors. Using the quasiclassical Green's function formalism, we show that the pair amplitude can be decomposed into even and odd-frequency components. We demonstrate that, quite generally, the spin-singlet even-parity (spin-triplet odd-parity) pair potential in a superconductor induces the odd-frequency pairing component with spin-singlet odd-parity (spin-triplet even-parity) near interfaces. The magnitude of the induced odd-frequency component is enhanced in the presence of the midgap Andreev resonant state due to the sign change of the anisotropic pair potential at the interface. The Josephson effect should therefore occur between odd- and even-frequency superconductors, contrary to the standard wisdom. A method to probe the odd-frequency superconductors is proposed.

AB - We predict generation of the odd-frequency pairing state near interfaces in conventional even-frequency superconductors. Using the quasiclassical Green's function formalism, we show that the pair amplitude can be decomposed into even and odd-frequency components. We demonstrate that, quite generally, the spin-singlet even-parity (spin-triplet odd-parity) pair potential in a superconductor induces the odd-frequency pairing component with spin-singlet odd-parity (spin-triplet even-parity) near interfaces. The magnitude of the induced odd-frequency component is enhanced in the presence of the midgap Andreev resonant state due to the sign change of the anisotropic pair potential at the interface. The Josephson effect should therefore occur between odd- and even-frequency superconductors, contrary to the standard wisdom. A method to probe the odd-frequency superconductors is proposed.

KW - METIS-243144

KW - IR-75083

U2 - 10.1016/j.physe.2007.05.004

DO - 10.1016/j.physe.2007.05.004

M3 - Article

VL - 40

SP - 163-

JO - Physica E

JF - Physica E

SN - 1386-9477

IS - 1

ER -