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Formation Mechanism of Hybridization Gap in Kondo Insulators based on a Realistic Band Model and Application to YbB_<12>
https://sucra.repo.nii.ac.jp/records/12485
https://sucra.repo.nii.ac.jp/records/124859a62ca20-6db6-4801-888a-a974f847045e
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 | 2007-03-08 | |||||
タイトル | ||||||
タイトル | Formation Mechanism of Hybridization Gap in Kondo Insulators based on a Realistic Band Model and Application to YbB_<12> | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | hybridization gap | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Kondo insulator | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | mixing | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Tight-binding model | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | LDA+U | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
著者 |
佐宗, 哲郎
× 佐宗, 哲郎× Harima, Hisatomo |
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著者 ローマ字 | ||||||
Saso, Tetsuro | ||||||
著者 所属 | ||||||
埼玉大学大学院理工学研究科 | ||||||
著者 所属(別言語) | ||||||
Saitama University, Graduate School of Science and Engineering | ||||||
書誌情報 |
Journal of the Physical Society of Japan 巻 72, 号 5, p. 1131-1137, 発行日 2003 |
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年月次 | ||||||
2003 | ||||||
出版者名 | ||||||
出版者 | Physical Society of Japan | |||||
DOI | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | DOI | |||||
関連識別子 | info:doi/10.1143/JPSJ.72.1131 | |||||
関連サイト | ||||||
内容記述タイプ | Other | |||||
内容記述 | http://jpsj.ipap.jp/link?JPSJ/72/1131/ | http://jpsj.ipap.jp/link?JPSJ/72/1131/ | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | A new LDA+U band calculation is performed on the Kondo insulator material YbB12 and an energy gap of about 0.001Ryd is obtained. Based on this, a simple tight-binding model with 5dε and 4f Γ8 orbitals on Yb atoms and the nearest neighbor σ-bonds between them is constructed with a good agreement to the above the LDA+U calculation near the gap. The density of states is also calculated and the shape is found to be very asymmetric with respect to the gap. A formation mechanism of the gap is clarified for the first time in a realistic situation with the orbital degeneracies in both conduction bands and the f states. This model can be a useful starting point for incorporating the strong correlation effect, and for understanding all the thermal, thermoelectric, transport and magnetic properties of YbB12. | |||||
注記 | ||||||
内容記述タイプ | Other | |||||
内容記述 | Copyright(c)2003 The Physical Society of Japan | |||||
版 | ||||||
[著者版] | ||||||
著者版フラグ | ||||||
出版タイプ | AM | |||||
出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||
資源タイプ | ||||||
内容記述タイプ | Other | |||||
内容記述 | text | |||||
フォーマット | ||||||
内容記述タイプ | Other | |||||
内容記述 | application/pdf | |||||
作成日 | ||||||
日付 | 2007-03-05 | |||||
日付タイプ | Created | |||||
アイテムID | ||||||
A1001026 |