论文标题
排斥二进制混合物中的非平衡过程
Nonequilibrium Processes in Repulsive Binary Mixtures
论文作者
论文摘要
我们考虑经典的三维，纯粹的排斥二进制混合物中的快速冷却过程，其中初始的无限温度（理想气体）构型立即淬灭至零温度。发现这样的系统显示了两种排序过程，可以通过调整不同粒子之间的相互作用来控制其类型。虽然强种间的排斥会导致化学排序在不混合过程方面，但弱排斥会产生自发的结晶，从而维持化学均匀性。该结果表明，随着种类内相互作用强度的变化，潜在电位能量景观的地形中存在过渡。此外，双重型行为似乎对于排斥配对的电势能函数似乎是通用的，而结晶过程的倾向与它们在零分离附近的行为相关。
We consider rapid cooling processes in classical, 3-dimensional, purely repulsive binary mixtures in which an initial infinite-temperature (ideal-gas) configuration is instantly quenched to zero temperature. It is found that such systems display two kinds of ordering processes, the type of which can be controlled by tuning the interactions between unlike particles. While strong inter-species repulsion leads to chemical ordering in terms of an unmixing process, weak repulsion gives rise to spontaneous crystallization, maintaining chemical homogeneity. This result indicates the existence of a transition in the topography of the underlying potential-energy landscape as the intra-species interaction strength is varied. Furthermore, the dual-type behavior appears to be universal for repulsive pair-interaction potential-energy functions in general, with the propensity for the crystallization process being related to their behavior in the neighborhood of zero separation.
