Short-lime domain-wall dynamics in the random-field Ising model with a driving field

摘要：

With Monie Carlo methods, we investigate the relaxation dynamics of a domain wall in the twodimensional random-field Ising model with a driving field. The short-lime dynamic K-havior at the depinning transition is carefully examined, and the roughening process of (he domain wall is observed. Based on the short-time dynamic scaling form, we accurately determine the transition field, static and dynamic exponents, and local and global roughness exponents. In contrast to the usual assumption, the results indicate that the domain interface does not belong lo the universality class of the EdwardsWilkinson equation. In particular, due to the dynamic effect of overhangs, the domain interface exhibits intrinsic anomalous scaling and spatial multiscaling behaviors, compatible with the experiments.

关键词： dynamic critical phenomena

作者: N. J. Zhou B. Zheng Y. Y. He

作者单位: Zhejiang Institute of Modern Physics. Zhejiang University. Hangzhou 310027. Peoples Repablic of China

会议类型: 国际会议

会议名称: International Workshop on Statistical Physics and Computer Sciences(统计物理与计算机科学交叉研究国际研讨会 )

会议地点: 北京

会议语种:英文

页码: 294-300

在线出版日期: 2010-07-08（万方平台首次上网日期，不代表论文的发表时间）