Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2002-04-19
Phys. Rev. E 66, 066116 (2002) (12 pages).
Physics
Condensed Matter
Statistical Mechanics
18 pages RevTex4 with imbedded figures
Scientific paper
10.1103/PhysRevE.66.066116
The local structure of a solid-on-solid (SOS) interface in a two-dimensional kinetic Ising ferromagnet with single-spin-flip Glauber dynamics, which is driven far from equilibrium by an applied field, is studied by an analytic mean-field, nonlinear-response theory [P.A. Rikvold and M. Kolesik, J. Stat. Phys. 100, 377 (2000)] and by dynamic Monte Carlo simulations. The probability density of the height of an individual step in the surface is obtained, both analytically and by simulation. The width of the probability density is found to increase dramatically with the magnitude of the applied field, with close agreement between the theoretical predictions and the simulation results. Excellent agreement between theory and simulations is also found for the field-dependence and anisotropy of the interface velocity. The joint distribution of nearest-neighbor step heights is obtained by simulation. It shows increasing correlations with increasing field, similar to the skewness observed in other examples of growing surfaces.
Kolesik Miroslav
Rikvold Per Arne
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