Moving nonlinear localized modes for one-dimensional Klein-Gordon diatomic lattice

被引：5
|
作者：
Zhou, GH [1 ]
Pan, LX
Yan, JR
机构：
[1] Hunan Normal Univ, Dept Phys, Changsha 410081, Peoples R China
[2] Hunan Normal Univ, Inst Nonlinear Phys, Changsha 410081, Peoples R China
[3] Chinese Acad Sci, Int Ctr Mat Phys, Shenyang 110015, Peoples R China
[4] Teachers Coll, Dept Phys, Yiyang 413049, Peoples R China
来源：
CHINESE PHYSICS | 2001年 / 10卷 / 08期
关键词：
diatomic lattice; localized modes; semi-discrete approximation;
D O I：
10.1088/1009-1963/10/8/303
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We study analytically the moving nonlinear localized vibrational modes (discrete breathers) for a one-dimensional Klein-Gordon diatomic lattice in the whole omega (q) plane of the system by means of a semi-discrete approximation, in which the carrier wave of the modes is treated explicitly while the envelope is described in the continuum approximation. We find that both pulse and kink envelope moving modes for this lattice system can occur with certain carrier wave vectors and vibrational frequencies in separate regions of the omega (q) plane. However, the kink envelope moving modes have not been reported previously for this lattice system.
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页码：689 / 693
页数：5
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