玻璃材料物理老化的原子机制
Atomistic mechanism of physical ageing in glassy materials
摘要：
使用分子模拟，我们确定微观弛豫事件的个别粒子在老化的结构玻璃，并确定完整的弛豫时间分布。我们发现，记忆的等待时间$t_w$流逝，因为淬火只延伸到第一个弛豫事件，而所有随后的弛豫时间（持续时间）的分布遵循幂律完全独立的历史。我们的结果是在显着的协议与著名的老化的唯象陷阱模型。一个连续的时间随机游走（CTRW）参数化的原子分布捕获整个体扩散行为，并解释了明显的缩放的弛豫动力学与$t_w$在老化过程中，以及观察到的偏差从完美的缩放。
英文摘要：
Using molecular simulations, we identify microscopic relaxation events of individual particles in ageing structural glasses, and determine the full distribution of relaxation times. We find that the memory of the waiting time $t_w$ elapsed since the quench extends only up to the first relaxation event, while the distribution of all subsequent relaxation times (persistence times) follows a power law completely independent of history. Our results are in remarkable agreement with the well known phenomenological trap model of ageing. A continuous time random walk (CTRW) parametrized with the atomistic distributions captures the entire bulk diffusion behavior and explains the apparent scaling of the relaxation dynamics with $t_w$ during ageing, as well as observed deviations from perfect scaling.
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。
