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Novel s-wave due to coexisting ferro- and antiferromagnetic fluctuations in iron pnictides
http://hdl.handle.net/10191/47681
http://hdl.handle.net/10191/47681cc3d1a54-dfd7-419d-8748-2ed9ea39096c
名前 / ファイル | ライセンス | アクション |
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592_012077.pdf (137.9 kB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2017-07-18 | |||||
タイトル | ||||||
タイトル | Novel s-wave due to coexisting ferro- and antiferromagnetic fluctuations in iron pnictides | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Novel s-wave due to coexisting ferro- and antiferromagnetic fluctuations in iron pnictides | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | journal article | |||||
著者 |
Ishizuka, Jun
× Ishizuka, Jun× Yamada, Takemi× Ono, Yoshiaki |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | The five-orbital Hubbard model for iron pnictides is investigated by using the dynamical meanfield theory (DMFT) in conjunction with the Eliashberg equation in the strong correlation regime where the ferromagnetic (FM) and antiferromagnetic (AFM) fluctuations are simultaneously enhanced. When the intraorbital Coulomb interaction is a little smaller than the interorbital one, the FM fluctuation is largely enhanced due to the significant orbital dependence of the vertex correction and becomes comparable to the AFM fluctuation, in contrast to the result from the random phase approximation where the AFM fluctuation is exclusively enhanced due to the nesting between hole and electron Fermi surfaces (FSs). The enhanced FM fluctuation induces the large repulsive pairing interaction between inner and outer hole FSs while the AFM fluctuation does between the hole and electron FSs. The latter is partially counteracted by the attractive pairing interaction mediated by the antiferro-orbital fluctuation. The resulting pairing state is found to be a novel s-wave in which the gap function of the inner hole FS has the opposite sign to that of the outer hole and electron FSs. | |||||
書誌情報 |
Journal of Physics: Conference Series en : Journal of Physics: Conference Series 巻 592, 号 1, p. 012077-1-012077-5, 発行日 2015-03 |
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出版者 | ||||||
出版者 | IOP Publishing | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 17426588 | |||||
書誌レコードID | ||||||
識別子タイプ | NCID | |||||
関連識別子 | BA87701391 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | info:doi/10.1088/1742-6596/592/1/012077 | |||||
著者版フラグ | ||||||
値 | author |