弹塑性介导低于模态耦合温度的动力学不均匀性
Elastoplasticity Mediates Dynamical Heterogeneity Below the Mode-Coupling Temperature
摘要：
当液体接近玻璃化转变温度时，动力学不均匀性成为其行为的重要普遍特征。动态易化，即局部运动触发附近的进一步运动，在这种现象中起着重要作用。在这里，我们表明，远程，弹性介导的促进出现低于模式耦合温度，添加到在所有温度下存在的短程组件。我们的研究结果表明，过冷液体和玻璃态之间有着深刻的联系，并为更深入地了解玻璃体系中的动力学不均匀性铺平了道路。
英文摘要：
As liquids approach the glass transition temperature, dynamical heterogeneity emerges as a crucial universal feature of their behavior. Dynamic facilitation, where local motion triggers further motion nearby, plays a major role in this phenomenon. Here we show that long-range, elastically-mediated facilitation appears below the mode-coupling temperature, adding to the short-range component present at all temperatures. Our results suggest deep connections between the supercooled liquid and glass states, and pave the way for a deeper understanding of dynamical heterogeneity in glassy systems.
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