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A Possible Bipolaronic Transition in β-pyrochlore Compounds
http://hdl.handle.net/10191/26910
http://hdl.handle.net/10191/26910b24473b2-40c7-4982-8851-1ceb9d011574
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
980.pdf (130.5 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 | A Possible Bipolaronic Transition in β-pyrochlore Compounds | |||||
| タイトル | ||||||
| タイトル | A Possible Bipolaronic Transition in β-pyrochlore Compounds | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | β-Pyrochlore oxide | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | KOs2O6 | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Bipolaronic transition | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Hubbard–Holstein model | |||||
| 資源タイプ | ||||||
| 資源 | http://purl.org/coar/resource_type/c_6501 | |||||
| タイプ | journal article | |||||
| 著者 |
Fuse, T.
× Fuse, T.× Ono, Y. |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | We investigate the Hubbard–Holstein model by using the dynamical mean-field theory combined with the exact diagonalization method. Below a critical temperature Tcr, a coexistence of two solutions, small lattice fluctuating solution (polaronic state) and large one (bipolaronic state), is found for the same value of the electron–phonon coupling g in the range gc1<g<gc2 for a fixed value of the Coulomb interaction U. As the result, the system shows a first-order phase transition at Tp(<T cr) from the bipolaronic to the polaronic states as T decreases. The effective potential for oscillating atoms, which is renormalized due to the effect of g, is double-well type for T>Tp, while it is single-well type for T<Tp. The obtained transition for small U case with small Tp and discontinuities in physical quantities seems to be account for the rattling transition observed in the β-pyrochlore oxide KOs2O6. | |||||
| 書誌情報 |
Physica. C, Superconductivity and its applications en : Physica. C, Superconductivity and its applications 巻 470, 号 Supplement 1, p. S701-S702, 発行日 2010-12 |
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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.2010.01.022 | |||||
| 著者版フラグ | ||||||
| 値 | author | |||||
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Cite as
Fuse, T., Ono, Y., 2010, A Possible Bipolaronic Transition in β-pyrochlore Compounds: Elsevier, S701–S702 p.
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