Self-consistent theory of intrinsic localized modes: Application to monatomic chain

被引：8
|
作者：
Hizhnyakov, V.
Shelkan, A.
Klopov, M.
机构：
[1] Univ Tartu, Inst Phys, EE-51014 Tartu, Estonia
[2] Tallinn Univ Technol, Inst Phys, EE-19086 Tallinn, Estonia
来源：
PHYSICS LETTERS A | 2006年 / 357卷 / 4-5期
关键词：
lattice vibrations; anharmonicity; intrinsic localized mode;
D O I：
10.1016/j.physleta.2006.04.064
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
A theory of intrinsic localized modes (ILMs) in anharmonic lattices is developed, which allows one to reduce the original nonlinear problem to a linear problem of small variations of the mode. This enables us to apply the Lifshitz method of the perturbed phonon dynamics for the calculations of ILMs. In order to check the theory, the ILMs in monatomic chain are considered. A comparison of the results with the corresponding molecular dynamics calculations shows an excellent agreement. (c) 2006 Elsevier B.V. All rights reserved.
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页码：393 / 396
页数：4
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