Coarsening of a Class of Driven Striped Structures

Details Coarsening of a Class of Driven Striped Structures Coarsening of a Class of Driven Striped Structures

2000-08-17

arxiv.org/abs/cond-mat/0008251v1

Phys Rev E 62 7619-7626 (2000)

Physics

Condensed Matter

Statistical Mechanics

Scientific paper

10.1103/PhysRevE.62.7619

The coarsening process in a class of driven systems exhibiting striped structures is studied. The dynamics is governed by the motion of the driven interfaces between the stripes. When two interfaces meet they coalesce thus giving rise to a coarsening process in which l(t), the average width of a stripe, grows with time. This is a generalization of the reaction-diffusion process A + A -> A to the case of extended coalescing objects, namely, the interfaces. Scaling arguments which relate the coarsening process to the evolution of a single driven interface are given, yielding growth laws for l(t), for both short and long time. We introduce a simple microscopic model for this process. Numerical simulations of the model confirm the scaling picture and growth laws. The results are compared to the case where the stripes are not driven and different growth laws arise.

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