通过集体坐标方法研究布洛赫墙的迁移
统计力学
2009-10-31 v1
摘要
我们研究了在存在磁场的各向异性一维自旋链中布洛赫墙的耗散运动问题。采用所谓的“集体坐标方法”，我们构建了一个与系统磁激发耦合的布洛赫墙有效哈密顿量。该方法允许我们以有效势垒的反射系数来分析墙的布朗运动。我们发现，在外部场具有有限值时，墙的迁移率也为有限。 investigated the spectrum of the potential at large fields and evaluated the dependence of the damping constant on temperature. As a result we find the temperature and magnetic field dependence of the wall mobility.
引用
@article{arxiv.cond-mat/9902330,
title = {Mobility of Bloch Walls via the Collective Coordinate Method},
author = {M. A. Despósito and A. Villares Ferrer and A. O. Caldeira and A. H. Castro Neto},
journal= {arXiv preprint arXiv:cond-mat/9902330},
year = {2009}
}
备注
20 pages, 5 figures