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arXiv 0902.1501cond-mat.dis-nn
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玻璃态体系中一种新的普遍老化类

A new universality class of aging in glassy systems

Ariel Amir, Yuval Oreg, Yoseph Imry

摘要:

玻璃态系统在自然界中普遍存在,其特征是缓慢弛豫到平衡,没有典型的时间尺度,老化和记忆效应。理解这些是物理学中一个长期存在的问题。我们研究了老化的电子玻璃,系统表现出显着的缓慢弛豫的电导。我们发现,对于通常的老化方案,弛豫率的宽分布导致了log(1+t_w/t)形式的普遍弛豫,其中t_w是驱动系统脱离平衡的扰动持续时间,t是测量时间。这些结果与在不同的玻璃上进行的几个实验吻合得很好,并检查不同的物理观测值,时间从几秒钟到几个小时不等。建议的理论框架似乎提供了一个范例,在广泛的玻璃材料老化。

英文摘要:

Glassy systems are ubiquitous in nature, and are characterized by slow relaxations to equilibrium without a typical timescale, aging and memory effects. Understanding these is a long-standing problem in physics. We study the aging of the electron glass, a system showing remarkable slow relaxations in the conductance. We find that the broad distribution of relaxation rates leads to a universal relaxation of the form log(1+t_w/t) for the usual aging protocol, where t_w is the length of time the perturbation driving the system out-of-equilibrium was on, and t the time of measurement. These results agree well with several experiments performed on different glasses, and examining different physical observables, for times ranging from seconds to several hours. The suggested theoretical framework appears to offer a paradigm for aging in a broad class of glassy materials.

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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