Hole-s± state induced by coexisting ferro- and antiferromagnetic and antiferro-orbital fluctuations in iron pnictides

Jun Ishizuka, Takemi Yamada, Yuki Yanagi, Yoshiaki Ono

研究成果: Article査読

2 被引用数 (Scopus)

抄録

The five-orbital Hubbard model for iron-based superconductors is investigated using the dynamical mean-field theory combined with the Eliashberg equation to clarify the local correlation effects on the electronic states and the superconductivity. In the specific case where the antiferromagnetic (AFM) and antiferro-orbital (AFO) fluctuations are comparably enhanced, the orbital dependence of the vertex function is significantly large, while that of the self-energy is small, in contrast to the AFM fluctuation-dominated case where the vertex function (the self-energy) shows a small (large) orbital dependence. The orbital-dependent vertex function together with the nesting between the inner and outer hole Fermi surfaces results in the enhancement of the inter-orbital ferromagnetic (FM) fluctuation in addition to the AFM and AFO fluctuations. In this case, the hole-s±-wave pairing with the sign change of the two hole Fermi surfaces is mediated by the coexisting three fluctuations as expected to be observed in the specific compound LiFeAs.

本文言語English
論文番号114709
ジャーナルjournal of the physical society of japan
85
11
DOI
出版ステータスPublished - 2016 11 15
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

フィンガープリント

「Hole-s<sub>±</sub> state induced by coexisting ferro- and antiferromagnetic and antiferro-orbital fluctuations in iron pnictides」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル