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arXiv 1209.2301cond-mat.dis-nncond-mat.soft
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有驱动场的二维随机场伊辛模型中畴壁的蠕变运动

Creep motion of a domain wall in the two-dimensional random-field Ising model with a driving field

R. H. Dong, B. Zheng, N. J. Zhou

摘要:

用蒙特卡罗模拟研究了二维随机场伊辛模型中畴壁的蠕变运动。我们观察到非线性场速关系,并确定了蠕变指数μ。为了进一步研究蠕变运动的普适类,我们还测量了零场弛豫过程的粗糙度指数和能垒指数。我们发现,所有的指数依赖于无序的强度。

英文摘要:

With Monte Carlo simulations, we study the creep motion of a domain wall in the two-dimensional random-field Ising model with a driving field. We observe the nonlinear fieldvelocity relation, and determine the creep exponent μ. To further investigate the universality class of the creep motion, we also measure the roughness exponent ζ and energy barrier exponent ψ from the zero-field relaxation process. We find that all the exponents depend on the strength of disorder.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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