Dynamics of magnetized colloids on a disordered substrate

作者：Cao Y G^*; Li Q X

来源：Physica A: Statistical Mechanics and Its Applications , 2008, 387(19-20): 4755-4759.

DOI：10.1016/j.physa.2008.04.026

• magnetized colloid
• dynamics

Using Langevin simulations, we study numerically the dynamics of two-dimensional magnetized colloids on a disordered substrate. With an increase in the strength of substrate, we find a crossover from elastic to plastic depinnings. In the elastic regime with weak substrates, a power-law relationship between average velocity and applied driving is found to be different from that in charged colloids. In the plastic regime with strong substrates, we find a dynamic transition from the plastic flow to a moving smectic as the drive is increased high above the depinning, as well as a transition from the moving smectic to a moving crystal at high enough drives.

• 出版日期2008-8
• 单位郑州大学