Odd-frequency superconductivity on the Hubbard model using the FLEX approximation

Yuichiro Shimokaji, Seiichiro Onari, Yukio Tanaka, Kazumasa Miyake

Research output: Contribution to journalArticle

Abstract

It is an important issue to clarify whether the odd-frequency superconducting state can be derived from microscopic Hamiltonian or not, where gap function has an odd-parity in frequency. We study the instability of following four superconducting states: (1) even-frequency spin-singlet, (2) even-frequency spin-triplet, (3) odd-frequency spin-singlet and (4) odd-frequency spin-triplet. By using the fluctuation exchange (FLEX) approximation on a triangular and square lattice, we find that the odd-frequency spin-triplet pairing can become dominant at a certain region where the suppression of the antiferromagnetic fluctuation due to a geometric frustration becomes prominent.

Original languageEnglish
Pages (from-to)3280-3282
Number of pages3
JournalJournal of Physics and Chemistry of Solids
Volume69
Issue number12
DOIs
Publication statusPublished - Dec 2008
Externally publishedYes

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Hamiltonians
Hubbard model
Superconductivity
superconductivity
approximation
frustration
parity
retarding

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Odd-frequency superconductivity on the Hubbard model using the FLEX approximation. / Shimokaji, Yuichiro; Onari, Seiichiro; Tanaka, Yukio; Miyake, Kazumasa.

In: Journal of Physics and Chemistry of Solids, Vol. 69, No. 12, 12.2008, p. 3280-3282.

Research output: Contribution to journalArticle

Shimokaji, Yuichiro ; Onari, Seiichiro ; Tanaka, Yukio ; Miyake, Kazumasa. / Odd-frequency superconductivity on the Hubbard model using the FLEX approximation. In: Journal of Physics and Chemistry of Solids. 2008 ; Vol. 69, No. 12. pp. 3280-3282.
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