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arXiv 1204.0772cond-mat.dis-nn
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随机介质中弹性弦脱钉相变的热舍入指数

Thermal rounding exponent of the depinning transition of an elastic string in a random medium

S. Bustingorry, A. B. Kolton, T. Giamarchi

摘要:

我们数值研究了在二维非关联无序势驱动下弹性弦脱钉相变的热效应。弦的速度正好在样品的临界力表现为$V \sim T^ψ$,与$ψ$的热舍入指数。我们表明,计算值的热舍入指数,$ψ= 0.15$,是强大的,并占在稳态和瞬态松弛到稳态的几个观测值的不同标度特性。特别是,我们示出的热舍入指数的相容性与标度性能的稳态结构因子,在样品临界力的瞬态速度的普遍的短时间动态,和速度标度函数描述的联合依赖于外部驱动器和温度的稳态速度。

英文摘要:

We study numerically thermal effects at the depinning transition of an elastic string driven in a two-dimensional uncorrelated disorder potential. The velocity of the string exactly at the sample critical force is shown to behave as $V \sim T^ψ$, with $ψ$ the thermal rounding exponent. We show that the computed value of the thermal rounding exponent, $ψ= 0.15$, is robust and accounts for the different scaling properties of several observables both in the steady-state and in the transient relaxation to the steady-state. In particular, we show the compatibility of the thermal rounding exponent with the scaling properties of the steady-state structure factor, the universal short-time dynamics of the transient velocity at the sample critical force, and the velocity scaling function describing the joint dependence of the steady-state velocity on the external drive and temperature.

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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