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Superconductivity in a two-orbital Hubbard model with electron and hole Fermi pockets : Application to iron oxypnictide superconductors
http://hdl.handle.net/10076/11163
http://hdl.handle.net/10076/11163be9ceb4c-cf7c-4694-9fcd-9a8c8c96d57e
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
40A13560.pdf (152.9 kB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||||||
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| 公開日 | 2010-06-21 | |||||||||
| タイトル | ||||||||||
| タイトル | Superconductivity in a two-orbital Hubbard model with electron and hole Fermi pockets : Application to iron oxypnictide superconductors | |||||||||
| 言語 | en | |||||||||
| 言語 | ||||||||||
| 言語 | eng | |||||||||
| キーワード | ||||||||||
| 主題Scheme | Other | |||||||||
| 主題 | iron oxypnictide superconductors | |||||||||
| キーワード | ||||||||||
| 主題Scheme | Other | |||||||||
| 主題 | two-orbital Hubbard model | |||||||||
| キーワード | ||||||||||
| 主題Scheme | Other | |||||||||
| 主題 | pairing symmetry | |||||||||
| キーワード | ||||||||||
| 主題Scheme | Other | |||||||||
| 主題 | exact diagonalization | |||||||||
| 資源タイプ | ||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||
| 資源タイプ | journal article | |||||||||
| 著者 |
Sano, Kazuhiro
× Sano, Kazuhiro
× Ōno, Yoshiaki
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| 抄録 | ||||||||||
| 内容記述タイプ | Abstract | |||||||||
| 内容記述 | We investigate electronic states of the one-dimensional two-orbital Hubbard model with band splitting by using the exact diagonalization method. The Luttinger liquid parameter Kρ is calculated to obtain superconducting (SC) phase diagram as a function of on-site interactions: the intra- and inter-orbital Coulomb U and U′, the Hund coupling J and the pair transfer J′. In this model, electron and hole Fermi pockets are originated when the Fermi level crosses both upper and lower orbital bands. We find that the system shows two types of SC phases, the SC I for U > U′ and the SC II for U < U′, in the wide parameter region including both weak and strong correlation regimes. Pairing correlation functions indicate that the most dominant pairing for the SC I (SC II) is the intersite (on-site) intra-orbital spin-singlet with (without) sign reversal of the order parameters between the two Fermi pockets. The result of the SC I is consistent with the sign-reversing s-wave pairing recently proposed for iron oxypnictide superconductors. | |||||||||
| 書誌情報 |
Journal of the Physical Society of Japan 巻 78, p. 124706, 発行日 2009-12-10 |
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| ISSN | ||||||||||
| 収録物識別子タイプ | PISSN | |||||||||
| 収録物識別子 | 0031-9015 | |||||||||
| 書誌レコードID | ||||||||||
| 収録物識別子タイプ | NCID | |||||||||
| 収録物識別子 | AA00704814 | |||||||||
| DOI | ||||||||||
| 関連タイプ | isVersionOf | |||||||||
| 識別子タイプ | DOI | |||||||||
| 関連識別子 | 10.1143/JPSJ.78.124706 | |||||||||
| フォーマット | ||||||||||
| 内容記述タイプ | Other | |||||||||
| 内容記述 | application/pdf | |||||||||
| 著者版フラグ | ||||||||||
| 出版タイプ | AM | |||||||||
| 出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||||||
| 出版者 | ||||||||||
| 出版者 | Physical Society of Japan | |||||||||
| 資源タイプ（三重大） | ||||||||||
| 値 | Journal Article / 学術雑誌論文 | |||||||||
