Kuroki Kazuhiko, Onari Seiichiro, Arita Ryotaro, Usui Hidetomo, Tanaka Yukio, Kontani Hiroshi, Aoki Hideo
Department of Applied Physics and Chemistry, The University of Electro -Communications, Chofu, Tokyo 182-8585, Japan.
Phys Rev Lett. 2008 Aug 22;101(8):087004. doi: 10.1103/PhysRevLett.101.087004.
For a newly discovered iron-based high T_{c} 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.
对于新发现的铁基高温超导体LaFeAsO1-xFx，我们构建了一个最小模型，发现包含所有五个铁d带是必要的。将随机相位近似应用于该模型以研究超导的起源。我们得出结论，由跨越不相连费米面的嵌套产生的多个自旋涨落模式实现了扩展的s波配对，而d波配对也可能是另一种候选配对方式。
