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arXiv 2101.01237cond-mat.softcond-mat.dis-nn
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极端波动驱动玻璃能量景观中的松弛

Extremal fluctuations driving the relaxation in glassy energy landscapes

Stefan Boettcher, Paula A. Gago, Paolo Sibani

摘要:

合作的事件,需要巨大的波动是一个定义的特征,在许多材料的玻璃松弛的开始。在超导体、金属玻璃、凝胶、胶体和颗粒堆等各种系统中,这种间歇性事件的重要性已经被注意到。在这里,我们表明,禁止实现新的创纪录的高能量波动-明确施加一个“盖子”的波动谱-阻碍进一步放宽在玻璃相。这个盖子使我们能够直接测量记录事件对不断发展的系统的影响,在广泛的老化模拟中,这些截然不同的玻璃形成物如自旋玻璃和抽头颗粒堆。解释我们的研究结果的动态记录成功地解释了无处不在的,对数衰减的能量和记忆效应编码的两个时间的关联函数的老化系统的缩放。

英文摘要:

Cooperative events requiring anomalously large fluctuations are a defining characteristic for the onset of glassy relaxation across many materials. The importance of such intermittent events has been noted in systems as diverse as superconductors, metallic glasses, gels, colloids, and granular piles. Here, we show that prohibiting the attainment of new record-high energy fluctuations -- by explicitly imposing a ``lid'' on the fluctuation spectrum -- impedes further relaxation in the glassy phase. This lid allows us to directly measure the impact of record events on the evolving system in extensive simulations of aging in such vastly distinct glass formers as spin glasses and tapped granular piles. Interpreting our results in terms of a dynamics of records succeeds in explaining the ubiquity of both, the logarithmic decay of the energy and the memory effects encoded in the scaling of two-time correlation functions of aging systems.

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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