Influence of the temperature on the depinning transition of driven interfaces

Details Influence of the temperature on the depinning transition of driven interfaces Influence of the temperature on the depinning transition of driven interfaces

1998-05-13

arxiv.org/abs/cond-mat/9805156v2

Europhys. Lett. 44, 634 (1998)

Physics

Condensed Matter

Statistical Mechanics

5 pages, Latex, Figures included, to appear in Europhys. Lett

Scientific paper

10.1209/epl/i1998-00519-4

We study the dynamics of a driven interface in a two-dimensional random-field Ising model close to the depinning transition at small but finite temperatures T using Glauber dynamics. A square lattice is considered with an interface initially in (11)-direction. The drift velocity v is analyzed for the first time using finite size scaling at T = 0 and additionally finite temperature scaling close to the depinning transition. In both cases a perfect data collapse is obtained from which we deduce beta = 1/3 for the exponent which determines the dependence of v on the driving field, nu = 1 for the exponent of the correlation length and delta = 5 for the exponent which determines the dependence of v on T.

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