DISCRETENESS EFFECTS IN THE KINK SCATTERING BY A MASS IMPURITY

被引：20

作者：

BRAUN, OM ^{[1
]}

KIVSHAR, YS ^{[1
]}

机构：

[1] UNIV CALIF LOS ALAMOS SCI LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545

来源：

PHYSICS LETTERS A | 1990年 / 149卷 / 2-3期

关键词：

D O I：

10.1016/0375-9601(90)90536-W

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We demonstrate analytically that the repulsive character of a mass impurity is stipulated by discreteness effects in the sine- Gordon system. The threshold velocity for the kink reflection by a heavy mass is calculated in the framework of the effective equation of motion for the link center in the discrete sine-Gordon chain. The result is determined significantly by the lattice spacing, and the effect does not occur in a continuum model since then the Peierls-Nabarro barrier vanishes. © 1990.

引用

页码：119 / 123

页数：5

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