Dynamical transitions in correlated driven diffusion in a periodic potential

Details Dynamical transitions in correlated driven diffusion in a periodic potential Dynamical transitions in correlated driven diffusion in a periodic potential

1997-01-20

arxiv.org/abs/cond-mat/9701134v1

Physical Review Letters 78, 1295-1298 (1997)

Physics

Condensed Matter

Statistical Mechanics

4 pages, 3 pictures, revtex to appear in Phys Rev. Lett

Scientific paper

10.1103/PhysRevLett.78.1295

The diffusion of a two-dimensional array of particles driven by a constant force in the presence of a periodic external potential exhibits a hierarchy of dynamical phase transitions when the driving force is varied. This behavior can be explained by a simple phenomenological approach which reduces the system of strongly interacting particles to weakly interacting quasi-particles (kinks). The richness of the strongly coupled system is however not lost because, contrary to a single-Brownian particle, the array shows an hysteretic behavior even at non-zero temperature. The present investigation can be viewed as a first step toward understanding nanotribology.

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