Unconventional pairing originating from the disconnected fermi surfaces of superconducting LaFeAsO1-xFx

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

Research output: Contribution to journalArticlepeer-review

1431 Citations (Scopus)

Abstract

For a newly discovered iron-based high Tc superconductor LaFeAsO1-xFx, we have constructed a minimal model, where inclusion of all five Fe d bands is found to be necessary. The random-phase approximation is applied to the model to investigate the origin of superconductivity. We conclude that the multiple spin-fluctuation modes arising from the nesting across the disconnected Fermi surfaces realize an extended s-wave pairing, while d-wave pairing can also be another candidate.

Original languageEnglish
Article number087004
JournalPhysical Review Letters
Volume101
Issue number8
DOIs
Publication statusPublished - Aug 22 2008

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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