| Correlation between local vibrations and metal mass in AlB2-type transition-metal diborides |
| Chu WS(储旺盛) ; Zhang S(张爽); Yu MJ(于梅娟); Zheng LR(郑黎荣); Hu TD(胡天斗); Zhao HF(赵海峰); Wu ZY(吴自玉); Chu, WS; Zhang, S; Yu, MJ; Zheng, LR; Hu, TD; Zhao, HF; Marcelli, A; Bianconi, A; Saini, NL; Liu, WH; Wu, ZY
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| 2009
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| 发表期刊 | JOURNAL OF SYNCHROTRON RADIATION
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| 卷号 | 16期号:1页码:#REF! |
| 通讯作者 | Wu, ZY (reprint author), Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing 100049, Peoples R China.
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| 摘要 | Lattice vibrations have been investigated in TiB2, ZrB2 and HfB2 by temperature-dependent extended X-ray absorption fine structure (EXAFS) experiments. Data clearly show that the EXAFS oscillations are characterized by an anomalous behavior of the Debye-Waller factor of the transition-metal boron pair, which is suggested to be associated with a superposition of an optical mode corresponding to phonon vibrations induced by the B sublattice and an acoustic mode corresponding to the transition-metal (TM) sublattice. Data can be interpreted as a decoupling of the metal and boron vibrations observed in these transition-metal diborides (TMB2), a mechanism that may be responsible for the significant reduction of the superconducting transition temperature observed in these systems with respect to the parent MgB2 compound. The vibrational behavior of TM-TM bonds has also been investigated to study the occurrence of anisotropy and anomalies in the lattice vibrational behavior of TM-TM bonds. |
| 文章类型 | Article
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| 关键词 | EXAFS
diboride
superconductor
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| 学科领域 | Instruments & Instrumentation; Optics; Physics
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| DOI | 10.1107/S0909049508030628
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| 收录类别 | SCI
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| WOS类目 | Instruments & Instrumentation
; Optics
; Physics, Applied
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| WOS记录号 | WOS:000262862900005
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| 引用统计 |
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| 文献类型 | 期刊论文
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| 条目标识符 | http://ir.ihep.ac.cn/handle/311005/225621
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| 专题 | 多学科研究中心
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推荐引用方式
GB/T 7714 |
Chu WS,Zhang S,Yu MJ,et al. Correlation between local vibrations and metal mass in AlB2-type transition-metal diborides[J]. JOURNAL OF SYNCHROTRON RADIATION,2009,16(1):#REF!.
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| APA |
储旺盛.,张爽.,于梅娟.,郑黎荣.,胡天斗.,...&Wu, ZY.(2009).Correlation between local vibrations and metal mass in AlB2-type transition-metal diborides.JOURNAL OF SYNCHROTRON RADIATION,16(1),#REF!.
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| MLA |
储旺盛,et al."Correlation between local vibrations and metal mass in AlB2-type transition-metal diborides".JOURNAL OF SYNCHROTRON RADIATION 16.1(2009):#REF!.
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