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Effect of ferromagnetic spin fluctuations on the electronic states in NaxCoO2 based on two-dimensional triangular lattice 11-band d-p model
http://hdl.handle.net/10191/26879
http://hdl.handle.net/10191/26879abba4a32-1fa8-403d-b3e4-fb8ab638391f
名前 / ファイル | ライセンス | アクション |
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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 | Effect of ferromagnetic spin fluctuations on the electronic states in NaxCoO2 based on two-dimensional triangular lattice 11-band d-p model | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Effect of ferromagnetic spin fluctuations on the electronic states in NaxCoO2 based on two-dimensional triangular lattice 11-band d-p model | |||||
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 | ferromagnetic spin fluctuations | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | RPA | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | electronic specific heat | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | renormalized band | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | mass enhancement | |||||
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資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | journal article | |||||
著者 |
Yanagi, Yuki
× Yanagi, Yuki× Ono, Yoshiaki |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Electronic states of the CoO2 plane in NaxCoO2 are investigated on the basis of the triangular lattice 11-band d-p model by using the second order perturbation (SOP) and the random phase approximation (RPA). Due to the effect of the in-plane ferromagnetic fluctuations enhanced for 0:6 < x < 0.75, the quasiparticle dispersion near the Γ-point is strongly reduced to yield an almost flat dispersion just above the fermi level. With increasing x, the electronic specifc heat coefficient γincreases towards the critical doping xc ~ 0.75 above which the in-plane ferromagnetism takes place. We also find that the six small hole pockets near the K-point are stabilized due to the electron correlation effect within both the SOP and the RPA. | |||||
書誌情報 |
Journal of Physics and Chemistry of Solids en : Journal of Physics and Chemistry of Solids 巻 69, 号 12, p. 3317-3320, 発行日 2008-12 |
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出版者 | Elsevier | |||||
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収録物識別子タイプ | ISSN | |||||
収録物識別子 | 00223697 | |||||
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収録物識別子タイプ | NCID | |||||
収録物識別子 | AA00704949 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | info:doi/10.1016/j.jpcs.2008.06.078 | |||||
著者版フラグ | ||||||
値 | author |