Thermal shifts and electron-phonon interactions of T-4(2) and T-4(1). broad bands for ruby

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	Thermal shifts and electron-phonon interactions of T-4(2) and T-4(1). broad bands for ruby
	D. P. Ma ; N. Ma ; J. R. Chen
刊名	Communications in Theoretical Physics
	2002
卷号	37 期号:2 页码:247-252
关键词	crystal fields optical spectral bands electron-phonon interaction thermal expansion thermal shift theoretical calculations high-pressure field spectroscopy spectra
ISSN号	0253-6102
中文摘要	For the first time, by taking into account all the irreducible representations and their components in the electron-phonon interaction (EPI) as well as all the levels and the admixtures of wavefunctions within d(3) electronic configuration, the values of parameters in expressions of Raman and optical-branch terms of thermal shifts (TS) due to EPI for three levels, T-4(2) band and T-4(1) band of ruby have been evaluated; the contributions to TS of T-4(2) and T-4(1) broad bands from thermal expansion have also been. calculated; and then, the TS of the peak energies of 'T2 and 4 Ti broad bands have been calculated. The results are in satisfactory agreement with observed data. The values of single-electron reduced matrix elements representing the strengths of EPI of T-4(2) and T-4(1) bands have respectively been determined. For TS of the peak energies of T-4(2) and T-4(1) bands, it is found that the contribution to TS from the second-order term in EPI Hamiltonian is dominant; TS due to EPI of acoustic branches are over two times as much as those of optical branches, and both of them increase rapidly with temperature; the neighbor-level term is insignificant; the contribution to TS from thermal expansion is specially important, and all the three terms of TS of T-4(2) or T-4(1) band axe red shifts.
原文出处	://WOS:000173770800019
公开日期	2012-04-14
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/36368]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	D. P. Ma,N. Ma,J. R. Chen. Thermal shifts and electron-phonon interactions of T-4(2) and T-4(1). broad bands for ruby[J]. Communications in Theoretical Physics,2002,37(2):247-252.
APA	D. P. Ma,N. Ma,&J. R. Chen.(2002).Thermal shifts and electron-phonon interactions of T-4(2) and T-4(1). broad bands for ruby.Communications in Theoretical Physics,37(2),247-252.
MLA	D. P. Ma,et al."Thermal shifts and electron-phonon interactions of T-4(2) and T-4(1). broad bands for ruby".Communications in Theoretical Physics 37.2(2002):247-252.