准一维硬盘系统中的横向激励与锯齿形跃迁
Transverse excitations and zigzag transition in quasi-1D hard-disk system
摘要：
本文用分子动力学方法模拟了硬盘系统中的集体激发，该系统被限制在一个特定宽度的窄通道中，类似于磁盘紧密堆积的二维三角晶格。我们发现，横向激励，这对于硬盘系统是不存在的限制在1D和声学性质的限制在2D的情况下，q1D硬盘系统出现的横向光激发的形式，并可以被认为是一种工具，以检测结构过渡到锯齿形有序。通过分析纵向静态结构因子和对分布函数的密度演化，我们指出锯齿形有序的驱动力是笼化现象，在硬盘系统中，这种笼化现象是由与第一和第二近邻的排斥体积相互作用决定的，并且是熵的起源。
英文摘要：
Molecular dynamics computer simulations of collective excitations in a system of hard disks confined to a narrow channel of the specific width, that resembles 2D triangular lattice at disk close packing, are performed. We found that transverse excitations, which for hard-disk system are absent in the limit of 1D and are of acoustic nature in the limit of 2D, in the case of q1D hard-disk system emerge in the form of transverse optical excitations and could be considered as a tool to detect the structural transition to a zigzag ordering. By analyzing density evolution of longitudinal static structure factor and pair distribution function we have shown that driving force of zigzag ordering is caging phenomenon that in the case of hard-disk system is governed by excluded volume interaction with first and second neighbors and is of entropic origin.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
