Abstract
For an iron-based high Tc superconductor LaFeAsO 1-xFx, we construct 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 between the disconnected Fermi pockets realize basically an extended s-wave pairing, where the gap changes sign across the nesting vector.
| Original language | English |
|---|---|
| Article number | 025017 |
| Journal | New Journal of Physics |
| Volume | 11 |
| DOIs | |
| Publication status | Published - Feb 27 2009 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
Unconventional pairing originating from disconnected Fermi surfaces in the iron-based superconductor. / Kuroki, Kazuhiko; Onari, Seiichiro; Arita, Ryotaro; Usui, Hidetomo; Tanaka, Yukio; Kontani, Hiroshi; Aoki, Hideo.
In: New Journal of Physics, Vol. 11, 025017, 27.02.2009.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Unconventional pairing originating from disconnected Fermi surfaces in the iron-based superconductor
AU - Kuroki, Kazuhiko
AU - Onari, Seiichiro
AU - Arita, Ryotaro
AU - Usui, Hidetomo
AU - Tanaka, Yukio
AU - Kontani, Hiroshi
AU - Aoki, Hideo
PY - 2009/2/27
Y1 - 2009/2/27
N2 - For an iron-based high Tc superconductor LaFeAsO 1-xFx, we construct 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 between the disconnected Fermi pockets realize basically an extended s-wave pairing, where the gap changes sign across the nesting vector.
AB - For an iron-based high Tc superconductor LaFeAsO 1-xFx, we construct 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 between the disconnected Fermi pockets realize basically an extended s-wave pairing, where the gap changes sign across the nesting vector.
UR - http://www.scopus.com/inward/record.url?scp=63449127204&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=63449127204&partnerID=8YFLogxK
U2 - 10.1088/1367-2630/11/2/025017
DO - 10.1088/1367-2630/11/2/025017
M3 - Article
VL - 11
JO - New Journal of Physics
JF - New Journal of Physics
SN - 1367-2630
M1 - 025017
ER -