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Local Plastic Response and Slow Heterogeneous Dynamics of Supercooled Liquids
Physical Review Letters ( IF 8.1 ) Pub Date : 2022-06-21 , DOI: 10.1103/physrevlett.128.258001 Yan-Wei Li 1 , Yugui Yao 1 , Massimo Pica Ciamarra 2
Physical Review Letters ( IF 8.1 ) Pub Date : 2022-06-21 , DOI: 10.1103/physrevlett.128.258001 Yan-Wei Li 1 , Yugui Yao 1 , Massimo Pica Ciamarra 2
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We demonstrate, via numerical simulations, that the relaxation dynamics of supercooled liquids correlates well with a plastic length scale measuring a particle’s response to impulsive localized perturbations and weakly to measures of local elasticity. We find that the particle averaged plastic length scale vanishes linearly in temperature and controls the super-Arrhenius temperature dependence of the relaxation time. Furthermore, we show that the plastic length scale of individual particles correlates with their typical displacement at the relaxation time. In contrast, the local elastic response only correlates with the dynamics on the vibrational timescale.
中文翻译：
过冷液体的局部塑性响应和慢非均匀动力学
我们通过数值模拟证明，过冷液体的弛豫动力学与测量粒子对脉冲局部扰动的响应的塑性长度尺度以及对局部弹性测量的微弱相关性。我们发现粒子平均塑性长度尺度随温度线性消失并控制弛豫时间的超阿伦尼乌斯温度依赖性。此外，我们表明单个粒子的塑性长度尺度与它们在弛豫时间的典型位移相关。相反，局部弹性响应仅与振动时间尺度上的动力学相关。
更新日期：2022-06-21
中文翻译：
过冷液体的局部塑性响应和慢非均匀动力学
我们通过数值模拟证明，过冷液体的弛豫动力学与测量粒子对脉冲局部扰动的响应的塑性长度尺度以及对局部弹性测量的微弱相关性。我们发现粒子平均塑性长度尺度随温度线性消失并控制弛豫时间的超阿伦尼乌斯温度依赖性。此外，我们表明单个粒子的塑性长度尺度与它们在弛豫时间的典型位移相关。相反，局部弹性响应仅与振动时间尺度上的动力学相关。
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