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
DOIs
Publication statusPublished - Jan 1 2008

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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