ASYMMETRIC IMPURITY MODES IN NONLINEAR LATTICES

被引：11
作者：
KOVALEV, AS
ZHANG, F
KIVSHAR, YS
机构：
[1] AUSTRALIAN NATL UNIV,RES SCH CHEM,CANBERRA,ACT 0200,AUSTRALIA
[2] AUSTRALIAN NATL UNIV,CTR OPT SCI,CANBERRA,ACT 0200,AUSTRALIA
来源：
PHYSICAL REVIEW B | 1995年 / 51卷 / 05期
关键词：
D O I：
10.1103/PhysRevB.51.3218
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We analyze spatially localized large-amplitude oscillations in the vicinity of an isotopic impurity. We show that, in addition to a symmetric nonlinear impurity mode found earlier [see, e.g., Yu. S. Kivshar, Phys. Lett. A 161, 80 (1991)], there exists an asymmetric impurity mode which appears as a result of a bifurcation from the symmetric mode. The structure of this asymmetric impurity mode is calculated analytically in the three-particle approximation and its stability is demonstrated by direct numerical simulations. © 1995 The American Physical Society.
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页码：3218 / 3221
页数：4
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