二维磁体脱钉相变中突出物和岛的动力学效应
Dynamic effect of overhangs and islands at the depinning transition in two-dimensional magnets
摘要：
本文利用Monte Carlo方法系统地研究了二维随机场伊辛模型中畴壁运动的短时动力学性质。医生？我们精确地确定了退钉扎转变场和临界指数。通过两种不同的定义域接口，我们研究的动态悬突和岛屿。在脱钉过渡区，悬臂和岛的动力效应达到最大。我们认为这是导致DRDT模型与具有淬火无序的Edwards-Wilkinson方程不同普适类的一个重要机制
英文摘要：
With the Monte Carlo methods, we systematically investigate the short-time dynamics of domain-wall motion in the two-dimensional random-field Ising model with a driving field ?DRFIM?. We accurately determine the depinning transition field and critical exponents. Through two different definitions of the domain interface, we examine the dynamics of overhangs and islands. At the depinning transition, the dynamic effect of overhangs and islands reaches maximum. We argue that this should be an important mechanism leading the DRFIM model to a different universality class from the Edwards-Wilkinson equation with quenched disorder
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