摘要
利用Langevin方程数值模拟研究了在外加驱动下的二维无序胶体系统的动力学特性。发现胶体的相互作用强度对胶体脱钉扎以及之后的运动有重要的影响。随着胶体相互作用强度的增加,胶体脱钉扎过程从塑性向弹性脱钉扎转变,这主要是归结于胶体间的相互作用和胶体与钉扎间相互作用的竞争结果。另外,模拟了在胶体系统的运动轨迹,发现随着胶体相互作用增加的同时,运动轨迹也会从无序到横向有序转变,最后横向和纵向都出现有序。
Using Langevin dynamics, we numerically study the dynamics of driven two dimensional colloids with randomly distributed pointlike centers. We found that the strength of colloids have an obvious effect on their depinning and moving. Increasing the strength of colloids, there is a crossover from clastic to plastic depinning. It is the result of the pinning disorder competing with the colloid interaction. Besides, the colloid trajectory near depinning become a periodic elastic channels with the strength of colloids increasing.
出处
《杭州电子科技大学学报(自然科学版)》
2006年第3期91-94,共4页
Journal of Hangzhou Dianzi University:Natural Sciences
基金
杭州电子科技大学科学研究基金资助项目(KYF091505021)
关键词
胶体
点钉扎中心
脱钉扎
colloid
pointlike center
depinning