Symmetry dependence of x-ray absorption near-edge structure at the metal K edge of 3d transition metal compounds
文献类型：期刊论文
| 作者 | Wu ZY(吴自玉) ; Xian DC(冼鼎昌); Wu, ZY; Xian, DC; Natoli, CR; Marcelli, A; Paris, E; Mottana, A
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| 刊名 | APPLIED PHYSICS LETTERS
 |
| 出版日期 | 2001 |
| 卷号 | 79期号:12页码:1918-1920 |
| 通讯作者 | Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing 100039, Peoples R China ; Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy ; Univ Camerino, Dipartimento Sci Terra, I-62032 Camerino, MC, Italy ; Univ Roma Tre, Dipartimento Sci Geol, I-00146 Rome, Italy |
| 英文摘要 | The pre-edge features in a system with "even" symmetry, apart from quadrupolar transition contribution, are mainly dipolar in character, associated with the existence of unoccupied states made up of mixed cation np with higher-neighboring cation- (n-1) d orbitals, and reflect the density of states due to the medium-range order of the system, while in "odd" symmetry materials these pre-edge features are the result of a transition from the Is to a final density of states of p symmetry due to an unsymmetrical mixing of the ligand wave functions with the central cation d orbitals. In the latter case, they contain not only the p but also the d base of orbitals, similar to a tetrahedral configuration. These results are validated for Fe as a photoabsorber by comparing x-ray absorption near-edge spectra of Fe2SiO4 (fayalite) and Fe2O3 (hematite) to ab initio full multiple scattering calculations at the Fe K edge, but pertain to all systems containing sixfold-coordinated cations. (C) 2001 American Institute of Physics. |
| 学科主题 | Physics |
| 类目[WOS] | Physics, Applied |
| 研究领域[WOS] | Physics |
| 原文出处 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000171014800059 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/239580]  |
| 专题 | 高能物理研究所_院士 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Wu ZY,Xian DC,Wu, ZY,et al. Symmetry dependence of x-ray absorption near-edge structure at the metal K edge of 3d transition metal compounds[J]. APPLIED PHYSICS LETTERS,2001,79(12):1918-1920. |
| APA | 吴自玉.,冼鼎昌.,Wu, ZY.,Xian, DC.,Natoli, CR.,...&Mottana, A.(2001).Symmetry dependence of x-ray absorption near-edge structure at the metal K edge of 3d transition metal compounds.APPLIED PHYSICS LETTERS,79(12),1918-1920. |
| MLA | 吴自玉,et al."Symmetry dependence of x-ray absorption near-edge structure at the metal K edge of 3d transition metal compounds".APPLIED PHYSICS LETTERS 79.12(2001):1918-1920. |
入库方式： OAI收割
来源：高能物理研究所
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