Lattice dynamics study of AlB2-type 4d transition-metal diborides by extended X-ray-absorption fine structure
文献类型：期刊论文
| 作者 | Chu WS(储旺盛) ; Wu ZY(吴自玉); Hu TD(胡天斗); Xie YN(谢亚宁); Chu, WS; Wu, ZY; Liu, WH; Saini, NL; Bianconi, A; Hu, TD
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| 刊名 | RADIATION PHYSICS AND CHEMISTRY
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| 出版日期 | 2006 |
| 卷号 | 75期号:11页码:2080-2084 |
| 关键词 | diboride superconductor EXAFS |
| 通讯作者 | CAS, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing 100049, Peoples R China ; Univ Sci & Technol China, Dept Phys, Hefei 230026, Peoples R China ; Univ Roma La Sapienza, Unita INFM, I-00185 Rome, Italy ; Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy |
| 英文摘要 | The recent discovery of the magnesium diboride superconductor, a system characterized by a remarkably high transition temperature (T-c = 39 K), has renewed interest towards experimental and theoretical research of the superconductivity in isostructural systems, such as transition-metal diborides. Here we present an X-ray-absorption fine-structure investigation in AlB2-type 4d transition-metal diborides TMB2 (TM = Y, Zr, Nb) at the transition-metal K-edge. The vibrational behavior of these transition-metal diborides has also been investigated by analyzing the extended X-ray-absorption fine-structure (EXAFS) spectra. The change of the bond length and Debye-Waller factors of TM-B, TM-TM (in-plane) and TM-TM (out-plane) with the covalent radii of the transition-metal atoms has been shown. Data clearly demonstrate that the chemical stability is in the following order for the 4d transition-metal diborides: ZrB2 > NbB2 > YB2. The chemical stability of YB2 must be much less than that of the two other compounds. It suggests that the species difference of the transition metals influences the vibrational behavior of TM-B and TM-TM bonds. In particular, a clearly different behavior of the vibration is observed for the transition-metal atoms in and out of plane. The results suggest the importance of the metal atoms in the diborides for superconductivity of these compounds and an intimate relationship between the local atomic displacements and the superconductivity. (c) 2006 Elsevier Ltd. All rights reserved. |
| 学科主题 | Chemistry; Nuclear Science & Technology; Physics |
| 类目[WOS] | Chemistry, Physical ; Nuclear Science & Technology ; Physics, Atomic, Molecular & Chemical |
| 研究领域[WOS] | Chemistry ; Nuclear Science & Technology ; Physics |
| 原文出处 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000242185600126 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/239643]  |
| 专题 | 高能物理研究所_多学科研究中心 |
| 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 | Chu WS,Wu ZY,Hu TD,et al. Lattice dynamics study of AlB2-type 4d transition-metal diborides by extended X-ray-absorption fine structure[J]. RADIATION PHYSICS AND CHEMISTRY,2006,75(11):2080-2084. |
| APA | 储旺盛.,吴自玉.,胡天斗.,谢亚宁.,Chu, WS.,...&Me, YN.(2006).Lattice dynamics study of AlB2-type 4d transition-metal diborides by extended X-ray-absorption fine structure.RADIATION PHYSICS AND CHEMISTRY,75(11),2080-2084. |
| MLA | 储旺盛,et al."Lattice dynamics study of AlB2-type 4d transition-metal diborides by extended X-ray-absorption fine structure".RADIATION PHYSICS AND CHEMISTRY 75.11(2006):2080-2084. |
入库方式： OAI收割
来源：高能物理研究所
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