晶体屏蔽减轻了结构重排，并在振荡剪切下的堵塞系统中定位记忆
Crystalline shielding mitigates structural rearrangement and localizes memory in jammed systems under oscillatory shear
摘要：
应力作用下非晶态材料的屈服性质尚未完全阐明。特别是，了解微观重排如何引起宏观结构和流变学签名的无序系统是至关重要的预测和表征的产量和记忆是如何存储在无序材料的研究。在这里，我们调查的局部结构的均匀性在一个单独的颗粒水平上的非晶堵塞的二维系统振荡剪切下的演变，并与这种演变的重排，记忆，和宏观流变测量。我们确定了一个新的结构度量，结晶屏蔽，这是预测的重排倾向和剪切下的单个粒子的结构波动性。我们使用这个指标来确定局部区域的系统中，材料的记忆，其准备保存。我们的研究结果有助于不断了解如何本地结构与动态响应和记忆在无序系统。
英文摘要：
The nature of yield in amorphous materials under stress has yet to be fully elucidated. In particular, understanding how microscopic rearrangement gives rise to macroscopic structural and rheological signatures in disordered systems is vital for the prediction and characterization of yield and for the study of how memory is stored in disordered materials. Here, we investigate the evolution of local structural homogeneity on an individual particle level in amorphous jammed two-dimensional systems under oscillatory shear, and relate this evolution to rearrangement, memory, and macroscale rheological measurements. We identify a new structural metric, crystalline shielding, that is predictive of rearrangement propensity and the structural volatility of individual particles under shear. We use this metric to identify localized regions of the system in which the material's memory of its preparation is preserved. Our results contribute to a growing understanding of how local structure relates to dynamic response and memory in disordered systems.
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