单分散硬椭球中的玻璃动力学
Glassy dynamics in monodisperse hard ellipsoids
摘要：
我们提出的证据从计算机模拟单分散硬椭球体悬浮液中的玻璃态动力学。在平衡状态下，近似球形的椭球体表现出从各向同性相到旋转相的一阶转变。当过压缩的各向同性相位到旋转政权，我们观察到超Arkanius减慢扩散和松弛，伴随着两步放松的位置和取向的recruitators。这种效应足够强，可以应用模式耦合理论的渐近定律。玻璃态动力学在单分散体系中是不寻常的。通常，尺寸的多分散性或颗粒物质的混合物是防止结晶的先决条件。在这里，我们表明，轻微的粒子不等作为一个足够的来源的混乱。这为玻璃形成所需成分的问题提供了新的线索。
英文摘要：
We present evidence from computer simulations for glassy dynamics in suspensions of monodisperse hard ellipsoids. In equilibrium, almost spherical ellipsoids show a first order transition from an isotropic phase to a rotator phase. When overcompressing the isotropic phase into the rotator regime, we observe super-Arrhenius slowing down of diffusion and relaxation, accompanied by two-step relaxation in positional and orientational correlators. The effects are strong enough for asymptotic laws of mode-coupling theory to apply. Glassy dynamics are unusual in monodisperse systems. Typically, polydispersity in size or a mixture of particle species is prerequisite to prevent crystallization. Here, we show that a slight particle anisometry acts as a sufficient source of disorder. This sheds new light on the question of which ingredients are required for glass formation.
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