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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
2009
Source PublicationJOURNAL OF SYNCHROTRON RADIATION
Volume16Issue:1Pages:#REF!
Corresponding AuthorWu, ZY (reprint author), Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing 100049, Peoples R China.
SubtypeArticle
AbstractLattice 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.
KeywordEXAFS diboride superconductor
Subject AreaInstruments & Instrumentation; Optics; Physics
DOI10.1107/S0909049508030628
Indexed BySCI
WOS SubjectInstruments & Instrumentation ; Optics ; Physics, Applied
WOS IDWOS:000262862900005
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Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/225621
Collection多学科研究中心
Recommended Citation
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!.
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!.
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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