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  1. 050 理学部
  2. 10 学術雑誌論文
  3. 10 査読済論文
  1. 0 資料タイプ別
  2. 01 学術雑誌論文

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/10191/26912
ece14f77-18bd-40ed-a27c-b7a313231747
名前 / ファイル ライセンス アクション
1001.pdf 1001.pdf (170.4 kB)
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
言語 en
タイトル Electronic states and metal-insulator transition in the triangular lattice d-p model for layered cobaltates
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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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
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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