Physical insight of superconductivity of Nb2AlC: in situ Raman spectrometry investigation

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	Physical insight of superconductivity of Nb2AlC: in situ Raman spectrometry investigation
	H. M. Xiang; X. H. Wang; J. Y. Wang; Y. C. Zhou
	2013
发表期刊	Journal of Raman Spectroscopy
ISSN	0377-0486
卷号	44 期号:3 页码:485-488
摘要	Superconductivity of Nb2AlC has been previously reported, but the origin is not clear. In this paper, in situ Raman spectra of Nb2AlC are measured in the temperature range from 80 to 380K at ambient pressure. The line-width of E2g (1) mode increases with temperature which originates from the anharmonic phononphonon scattering. On the contrary the line-widths of E2g (2) and A1g (4) modes decrease continuously at elevated temperature. The phenomenon is explained by the electronphonon coupling. The origin of superconductivity is therefore interpreted by the coupling of Nb 4d electrons with E2g (2) and A1g (4) phonon modes. Copyright (c) 2013 John Wiley & Sons, Ltd.
部门归属	[xiang, huimin ; wang, xiaohui ; wang, jingyang] chinese acad sci, high performance ceram div, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china. [xiang, huimin] chinese acad sci, grad sch, beijing 100049, peoples r china. [zhou, yanchun] aerosp res inst mat & proc technol, sci & technol adv funct composite lab, beijing 100076, peoples r china. ; wang, jy (reprint author), chinese acad sci, high performance ceram div, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china. ; jywang@imr.ac.cn
关键词	Ternary Carbide Max Phase Electronphonon Coupling Superconductivity Temperature-dependence m(n+1)Ax(n) Phases Max Phases Scattering Progress Phonons Nb4alc3 Silicon Ti2alc
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语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/71592
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	H. M. Xiang,X. H. Wang,J. Y. Wang,et al. Physical insight of superconductivity of Nb2AlC: in situ Raman spectrometry investigation[J]. Journal of Raman Spectroscopy,2013,44(3):485-488.
APA	H. M. Xiang,X. H. Wang,J. Y. Wang,&Y. C. Zhou.(2013).Physical insight of superconductivity of Nb2AlC: in situ Raman spectrometry investigation.Journal of Raman Spectroscopy,44(3),485-488.
MLA	H. M. Xiang,et al."Physical insight of superconductivity of Nb2AlC: in situ Raman spectrometry investigation".Journal of Raman Spectroscopy 44.3(2013):485-488.