Unconventional superconductivity originating from disconnected Fermi surfaces in the iron-based oxypnictide

Kazuhiko Kuroki, Seiichiro Onari, Ryotaro Arita, Hidetomo Usui, Yukio Tanaka, Hiroshi Kontani, Hideo Aoki

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

For a newly discovered iron-based high Tc superconductor LaFeAsO1-xFx, we have first constructed a minimal model, where all of the five Fe d bands turn out to be involved. We then investigate the origin of superconductivity with a five-band random-phase approximation by solving the Eliashberg equation. We conclude that the spin fluctuation modes arising from the nesting across the disconnected Fermi pockets realize an extended s-wave pairing, where, to be precise, the gap function is a 5 x 5 matrix.

Original languageEnglish
Pages (from-to)96-98
Number of pages3
JournalJournal of the Physical Society of Japan
Volume77
Issue numberSUPPL. C
Publication statusPublished - 2008
Externally publishedYes

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Fermi surfaces
superconductivity
iron
matrices
approximation

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Kuroki, K., Onari, S., Arita, R., Usui, H., Tanaka, Y., Kontani, H., & Aoki, H. (2008). Unconventional superconductivity originating from disconnected Fermi surfaces in the iron-based oxypnictide. Journal of the Physical Society of Japan, 77(SUPPL. C), 96-98.

Unconventional superconductivity originating from disconnected Fermi surfaces in the iron-based oxypnictide. / Kuroki, Kazuhiko; Onari, Seiichiro; Arita, Ryotaro; Usui, Hidetomo; Tanaka, Yukio; Kontani, Hiroshi; Aoki, Hideo.

In: Journal of the Physical Society of Japan, Vol. 77, No. SUPPL. C, 2008, p. 96-98.

Research output: Contribution to journalArticle

Kuroki, K, Onari, S, Arita, R, Usui, H, Tanaka, Y, Kontani, H & Aoki, H 2008, 'Unconventional superconductivity originating from disconnected Fermi surfaces in the iron-based oxypnictide', Journal of the Physical Society of Japan, vol. 77, no. SUPPL. C, pp. 96-98.
Kuroki, Kazuhiko ; Onari, Seiichiro ; Arita, Ryotaro ; Usui, Hidetomo ; Tanaka, Yukio ; Kontani, Hiroshi ; Aoki, Hideo. / Unconventional superconductivity originating from disconnected Fermi surfaces in the iron-based oxypnictide. In: Journal of the Physical Society of Japan. 2008 ; Vol. 77, No. SUPPL. C. pp. 96-98.
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