Spin and orbital occupation and phase transitions in V2O3
Physical Review B - Condensed Matter and Materials Physics 61 巻 17 号
11 506-11 509 頁
2000-05-01 発行
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| ファイル情報(添付) | |
| タイトル ( eng ) |
Spin and orbital occupation and phase transitions in V2O3
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| 作成者 |
Park J.-H.
Tjeng L. H.
Allen J. W.
Chen C. T.
Metcalf P.
Honig J. M.
de Groot F. M. F.
Sawatzky G. A.
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| 収録物名 |
Physical Review B - Condensed Matter and Materials Physics
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| 巻 | 61 |
| 号 | 17 |
| 開始ページ | 11 506 |
| 終了ページ | 11 509 |
| 抄録 |
Polarization dependent x-ray-absorption measurements were performed on pure and Cr-doped V2O3 single crystals in the antiferromagnetic insulating, paramagnetic insulating, and metallic phases. The orbital occupation of the V 3d2 ion is found to depend appreciably on the phase, but always with the S = 1 character, requiring an explanation which is beyond the elegant simplicity of the pure one-band Hubbard model or of models in which the a1g orbital is projected out by means of a simple dimerization. The results reveal the critical role of the spin and orbital dependence of the on-site 3d-3d Coulomb energy, and a mechanism is proposed to explain the closing or opening of the band gaps which are of much higher energy scale than the transition temperatures.
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| 言語 |
英語
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| 資源タイプ | 学術雑誌論文 |
| 出版者 |
American Physical Society
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| 発行日 | 2000-05-01 |
| 権利情報 |
Copyright (c) 2000 American Physical Society.
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| 出版タイプ | Version of Record（出版社版。早期公開を含む） |
| アクセス権 | オープンアクセス |
| 収録物識別子 |
[ISSN] 1098-0121
[DOI] 10.1103/PhysRevB.61.11506
[NCID] AA11187113
[DOI] http://dx.doi.org/10.1103/PhysRevB.61.11506
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