PENTA-HEPTA DEFECT MOTION IN HEXAGONAL PATTERNS

被引：21
作者：
TSIMRING, LS
机构：
[1] Institute for Nonlinear Science, University of California, San Diego
来源：
PHYSICAL REVIEW LETTERS | 1995年 / 74卷 / 21期
关键词：
D O I：
10.1103/PhysRevLett.74.4201
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The structure and dynamics of penta-hepta defects (PHD's) in hexagonal patterns are studied in the framework of coupled amplitude equations for the underlying plane waves. An analytical solution for the phase field of moving PHD is found in the far field, which generalizes the static solution due to Pismen and Nepomnyashchy. The mobility tensor of the PHD is calculated using a combined analytical and numerical approach. The results for the velocity of a PHD climbing in slightly nonoptimal hexagonal patterns are compared with numerical simulations of amplitude equations. The interaction of penta-hepta defects in optimal hexagonal patterns is considered. © 1995 The American Physical Society.
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页码：4201 / 4204
页数：4
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