基底势函数的无序性对静摩擦力的影响

The influence of the disorderded substrate potential on static friction force

在二维Frenkel-Kontorova模型中,为了更好地模拟真实的物理系统,采用高斯波的平移叠加作为基底,运用分子动力学模拟方法,讨论了有相互作用的原子平面在公度、不公度两种情况下,原子在无序基底上运动的摩擦机理,以及基底的无序对静摩擦力F_s的影响.

In order to better simulate a real model which can be realized in experiment, we study a two-dimensional（2D） FrenkelKontorova（FK） model driven by the disordered substrate potential which is charactered by the sum of identical Gaussian functions. Commensurate and incommensurate interfaces are discussed. In the paper, we mainly analyse the mechanism of friction, and the effects of static friction force on the disordered substrate potential.