论文标题
局部塑料响应和超冷液体的慢速异质动力学
Local Plastic Response and Slow Heterogeneous Dynamics of Supercooled Liquids
论文作者
论文摘要
通过数值模拟，我们证明了超冷液体的松弛动力学与塑料长度尺度非常相关，该塑料长度尺度测量了粒子对脉冲局部扰动的响应，并且与局部弹性的测量弱相关。我们发现粒子平均的塑料长度刻度在温度下线性消失，并控制放松时间的超级arrhenius温度依赖性。此外，我们表明单个颗粒的塑性长度尺度与它们在松弛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。
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 time scale.
