Abstract
Nonequilibrium wetting transitions are observed in Monte Carlo simulations of a kinetic spin system in the absence of a detailed balance condition with respect to an energy functional. A nonthermal model is proposed starting from a two-dimensional Ising spin lattice at zero temperature with two boundaries subject to opposing surface fields. Local spin excitations are only allowed by absorbing an energy quantum (photon) below a cutoff energy E c . Local spin relaxation takes place by emitting a photon which leaves the lattice. Using Monte Carlo simulation nonequilibrium critical wetting transitions are observed as well as nonequilibrium first-order wetting phenomena, respectively in the absence or presence of absorbing states of the spin system. The transitions are identified from the behavior of the probability distribution of a suitably chosen order parameter that was proven useful for studying wetting in the (thermal) Ising model.
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Hooyberghs, J., Indekeu, J.O. Nonequilibrium wetting transition in a nonthermal 2D Ising model. Eur. Phys. J. B 81, 155–163 (2011). https://doi.org/10.1140/epjb/e2011-20085-2
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DOI: https://doi.org/10.1140/epjb/e2011-20085-2