TY - JOUR
T1 - Unconventional superconductivity originating from disconnected Fermi surfaces in the iron-based oxypnictide
AU - Kuroki, Kazuhiko
AU - Onari, Seiichiro
AU - Arita, Ryotaro
AU - Usui, Hidetomo
AU - Tanaka, Yukio
AU - Kontani, Hiroshi
AU - Aoki, Hideo
PY - 2008/1/1
Y1 - 2008/1/1
N2 - 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.
AB - 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.
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U2 - 10.1143/JPSJS.77SC.96
DO - 10.1143/JPSJS.77SC.96
M3 - Article
AN - SCOPUS:57549097843
VL - 77
SP - 96
EP - 98
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - SUPPL. C
ER -