标题： 双分散球体堆积中的异质性和低频振动 显示英文标题

标题： Heterogeneity and Low-Frequency Vibrations in Bidisperse Sphere Packings

摘要： 在单分散包装的干扰转变中，空间异质性无关紧要，因为该转变由平均场理论描述。 这里，我们表明，如果粒子尺寸分散度足够大，这种情况会急剧变化。 我们使用计算机模拟研究具有大尺寸比的双分散球体包装的结构和振动特性。 在临界点附近，小颗粒倾向于形成团簇，导致大尺度结构异质性的出现。 同时，与单分散包装相比，低频振动显著增强，其状态密度随频率呈线性规律。 我们通过数值和理论方法证明，结构异质性和低频振动的行为密切相关。 本研究表明，异质包装的性质与均质包装的性质有明显不同。 显示英文摘要

摘要： In the jamming transition of monodisperse packings, spatial heterogeneity is irrelevant as the transition is described by mean-field theories. Here, we show that this situation drastically changes if the particle-size dispersity is large enough. We use computer simulations to study the structural and vibrational properties of bidisperse sphere packings with a large size ratio. Near the critical point, the small particles tend to form clusters, leading to the emergence of large-scale structural heterogeneity. Concomitantly, the low-frequency vibrations are significantly enhanced compared to those in monodisperse packings, and their density of states follows a linear law with the frequency. We numerically and theoretically demonstrate that these behaviors of the structural heterogeneity and the low-frequency vibrations are intimately connected. The present work suggests that the nature of heterogeneous packings is markedly different from that of homogeneous packings.