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Antiferromagnetic, Charge and Orbital Order in Na0.5CoO2 Based on the Two Dimensional 11 Bands d-p Model
http://hdl.handle.net/10191/26891
http://hdl.handle.net/10191/26891571742e8-3646-4ed1-99cc-023e549fb883
名前 / ファイル | ライセンス | アクション |
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987.pdf (88.7 kB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2014-04-16 | |||||
タイトル | ||||||
タイトル | Antiferromagnetic, Charge and Orbital Order in Na0.5CoO2 Based on the Two Dimensional 11 Bands d-p Model | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Antiferromagnetic, Charge and Orbital Order in Na0.5CoO2 Based on the Two Dimensional 11 Bands d-p Model | |||||
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 |
Yamakawa, Youichi
× Yamakawa, Youichi× Watanabe, Naohiro× Ono, Yoshiaki |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | The electronic state of the CoO2 plane in the layered cobalt oxide Na0.5CoO2 is investigated on the basis of the 11 band d-p model on a two dimensional triangular lattice, where the tight-binding parameters are determined so as to fit the LDA band structure and an effective one dimensional potential is added so as to include the effect of the Na order. We treat the Coulomb interaction on a Co site: the intra- and inter-orbital direct terms U and U', the exchange coupling J and the pair-transfer J', within the Hartree-Fock approximation. It is found that the metallic antiferromagnetic order takes place for Tc2 < T < Tc1 and the coexistent state of the antiferromagnetic, orbital and charge orders takes place for T < Tc2 where the system becomes insulator. The obtained results are consistent with the successive phase transitions observed in Na0.5CoO2. | |||||
書誌情報 |
Journal of Physics: Conference Series en : Journal of Physics: Conference Series 巻 200, 号 1, p. 012233-1-012233-4, 発行日 2010-02 |
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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 | |||||
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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/10.1088/1742-6596/200/1/012233 | |||||
著者版フラグ | ||||||
値 | author |