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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
Source PublicationJournal of Raman Spectroscopy
ISSN0377-0486
Volume44Issue:3Pages:485-488
AbstractSuperconductivity 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.
description.department[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
KeywordTernary 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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Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/71592
Collection中国科学院金属研究所
Recommended Citation
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.
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