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Electronic states and metal-insulator transition in the triangular lattice d-p model for layered cobaltates
http://hdl.handle.net/10191/26912
http://hdl.handle.net/10191/26912ece14f77-18bd-40ed-a27c-b7a313231747
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
1001.pdf (170.4 kB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2014-04-16 | |||||
| タイトル | ||||||
| タイトル | Electronic states and metal-insulator transition in the triangular lattice d-p model for layered cobaltates | |||||
| タイトル | ||||||
| タイトル | Electronic states and metal-insulator transition in the triangular lattice d-p model for layered cobaltates | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | NaxCoO2 | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Triangular lattice d–p model | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Metal–insulator transition | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Slave boson | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | 1/N expansion | |||||
| 資源タイプ | ||||||
| 資源 | http://purl.org/coar/resource_type/c_6501 | |||||
| タイプ | journal article | |||||
| 著者 |
Ono, Yoshiaki
× Ono, Yoshiaki |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | We investigate the electronic state of the 11 band d–p model on the two-dimensional triangular lattice simulating a CoO2 plane in the layered cobalt oxides such as NaxCoO2 and NaxCoO2 · yH2O. The tight-binding parameters are determined so as to fit the LDA band structure. Using the slave boson approach together with the 1/N expansion method, we obtain the renormalized quasiparticle bands, where the a1g band with a large hole Fermi surface is largely renormalized due to the strong correlation effect, while the eg' bands with six hole pockets are almost unchanged. We also discuss the metal–insulator transition (MIT) with varying the d–p charge transfer energy Δ, and find that the MIT takes place at a critical value Δc = 4.01 eV. | |||||
| 書誌情報 |
Physica. C, Superconductivity en : Physica. C, Superconductivity 巻 460-462, 号 Part 2, p. 1047-1048, 発行日 2007-09 |
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| 出版者 | ||||||
| 出版者 | Elsevier | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 09214534 | |||||
| 書誌レコードID | ||||||
| 収録物識別子タイプ | NCID | |||||
| 収録物識別子 | AA11461984 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | info:doi/10.1016/j.physc.2007.03.212 | |||||
| 著者版フラグ | ||||||
| 値 | author | |||||
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Cite as
Ono, Yoshiaki, 2007, Electronic states and metal-insulator transition in the triangular lattice d-p model for layered cobaltates: Elsevier, 1047–1048 p.
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