| フルテキストファイル | |
| 著者 |
Sakakibara, Hirofumi
Department of Applied Physics and Chemistry, The University of Electro-Communications
研究者総覧
KAKEN
Usui, Hidetomo
Department of Applied Physics and Chemistry, The University of Electro-Communications
Kuroki, Kazuhiko
Department of Applied Physics and Chemistry, The University of Electro-Communications / JST, TRIP
Arita, Ryotaro
Department of Applied Physics, The University of Tokyo / JST, TRIP / JST, CREST
Aoki, Hideo
Department of Physics, The University of Tokyo / JST, TRIP
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| 抄録 | In order to explore the reason why the single-layered cuprates, La2−x(Sr/Ba)xCuO4 (Tc≃40 K) and HgBa2CuO4+δ (Tc≃90 K) have such a significant difference in Tc, we study a two-orbital model that incorporates the dz2 orbital on top of the dx2−y2 orbital. It is found, with the fluctuation exchange approximation, that the dz2 orbital contribution to the Fermi surface, which is stronger in the La system, works against d-wave superconductivity, thereby dominating over the effect of the Fermi surface shape. The result resolves the long-standing contradiction between the theoretical results on Hubbard-type models and the experimental material dependence of Tc in the cuprates.
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| 出版者 | American Physical Society
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| 資料タイプ |
学術雑誌論文
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| 外部リンク | |
| ISSN | 00319007
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| 書誌ID | AA00773679
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| 掲載誌名 | Physical review letters
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| 巻 | 105
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| 開始ページ | 057003
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| 発行日 | 2010-07-30
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| 出版者DOI | |
| 著者版フラグ |
出版社版
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| 著作権表記 | ©2010 American Physical Society
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| 掲載情報 | H. Sakakibara, H. Usui, K. Kuroki, R. Arita and H. Aoki. Two-Orbital Model Explains the Higher Transition Temperature of the Single-Layer Hg-Cuprate Superconductor Compared to That of the La-Cuprate Superconductor. Physical review letters. 2010, 105, 057003
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| 部局名 |
工学部・工学研究科
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| 言語 |
英語
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