Study of high-frequency vibrational modes for nonlinear diatomic chains

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	Study of high-frequency vibrational modes for nonlinear diatomic chains
	G. H. Zhou ; J. R. Yan ; T. Yi ; Y. W. Duan ; Z. H. Chen
刊名	Physica Status Solidi B-Basic Research
	1997
卷号	200 期号:1 页码:49-56
关键词	hydrogen-bonded systems lattices excitations crystals dynamics
ISSN号	0370-1972
中文摘要	The model of a one-dimensional diatomic chain with two different types of nonlinearity (quartic nearest-neighbor interparticle interaction potential and substrate potential, respectively) is studied. The nonlinear partial differential-difference equations in the two parallel cases for the model are transformed into nonlinear ordinary differential equations by the approach cf decoupling ansatz plus continuum approximation. Through the qualitative analysis the nonlinear vibrational modes with various frequencies above the cut-off frequency of the linear spectrum are obtained for the systems. The difference of the modes for the two types of nonlinearity almost disappears as the mass of heavy atoms is three times greater than that of light ones. This similarity of interparticle interaction nonlinearity to substrate nonlinearity for the nonlinear diatomic chain is in agreement with the origin of the nonlinear substrate potential.
原文出处	://WOS:A1997WR13200006
公开日期	2012-04-14
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/38238]
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	G. H. Zhou,J. R. Yan,T. Yi,et al. Study of high-frequency vibrational modes for nonlinear diatomic chains[J]. Physica Status Solidi B-Basic Research,1997,200(1):49-56.
APA	G. H. Zhou,J. R. Yan,T. Yi,Y. W. Duan,&Z. H. Chen.(1997).Study of high-frequency vibrational modes for nonlinear diatomic chains.Physica Status Solidi B-Basic Research,200(1),49-56.
MLA	G. H. Zhou,et al."Study of high-frequency vibrational modes for nonlinear diatomic chains".Physica Status Solidi B-Basic Research 200.1(1997):49-56.