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Dynamics of magnetized colloids on a disordered substrate

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  • Cao, Y.G.
  • Li, Q.X.

Abstract

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.

Suggested Citation

  • Cao, Y.G. & Li, Q.X., 2008. "Dynamics of magnetized colloids on a disordered substrate," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 387(19), pages 4755-4759.
    • Handle: RePEc:eee:phsmap:v:387:y:2008:i:19:p:4755-4759
    DOI: 10.1016/j.physa.2008.04.026
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    Keywords

    Magnetized colloid; Dynamics;

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