Unconventional Pairing Originating from the Disconnected Fermi Surfaces of Superconducting LaFeAsO_1-xF_x

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Kazuhiko Kuroki,¹ Seiichiro Onari,² Ryotaro Arita,³ Hidetomo Usui,¹ Yukio Tanaka,² Hiroshi Kontani,⁴ and Hideo Aoki⁵
¹Department of Applied Physics and Chemistry, The University of Electro -Communications, Chofu, Tokyo 182-8585, Japan
²Department of Applied Physics, Nagoya University, and CREST-JST, Nagoya 464-8603, Japan
³RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
⁴Department of Physics, Nagoya University, Nagoya 464-8602, Japan
⁵Department of Physics, University of Tokyo, Tokyo 113-0033, Japan

See Also: Erratum

Received 27 March 2008; published 22 August 2008

Fora newly discovered iron-based high T_c superconductor LaFeAsO_1-xF_x, we haveconstructed a minimal model, where inclusion of all five Fed bands is found to be necessary. The random-phase approximationis applied to the model to investigate the origin ofsuperconductivity. We conclude that the multiple spin-fluctuation modes arising fromthe nesting across the disconnected Fermi surfaces realize an extendeds-wave pairing, while d-wave pairing can also be another candidate.

URL:	http://link.aps.org/doi/10.1103/PhysRevLett.101.087004
DOI:	10.1103/PhysRevLett.101.087004
PACS:	74.20.-z; 74.25.Jb; 74.70.Dd 74.20.-z Theories and models of superconducting state 74.25.Jb Electronic structure of superconductors 74.70.Dd Superconducting ternary, quaternary and multinary compounds YEAR: 2008

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Erratum

Erratum: Unconventional Pairing Originating from the Disconnected Fermi Surfaces of Superconducting LaFeAsO_1-xF_x [Phys. Rev. Lett. 101, 087004 (2008)]
Kazuhiko Kuroki, Seiichiro Onari, Ryotaro Arita et al.
Phys. Rev. Lett. 102, 109902 (E) (2009)