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  • Anisotropic ordering in a two-temperature lattice gas
    Szolnoki, Attila ; Szabó, György, 1950- ; Mouritsen, Ole G.
    We consider a two-dimensional lattice gas model with repulsive nearest- and next-nearest-neighbor interactions that evolves in time according to anisotropic Kawasaki dynamics. The hopping of ... particles along the principal directions is governed by two heat baths at different temperatures Tx and Ty. The stationary states of this nonequilibrium model are studied using a simple mean-field theory and linear stability analysis. The results are improved by a generalized dynamical mean-field approximation. In the stable ordered state the particles form parallel chains which are oriented along the direction of the higher temperature. In the resulting phase diagram in the Tx-Ty plane the critical temperature curve shows a weak maximum as a function of the parallel temperature which is confirmed by Monte Carlo simulations. Finite-size scaling analysis suggests that the model leaves the equilibrium universality class of the x-y model with cubic anisotropy and is described by the Ising exponents.
    Vir: Physical review. E. - ISSN 1063-651X (Vol. 55, iss. 3, 1997, str. 2255-2259)
    Vrsta gradiva - članek, sestavni del
    Leto - 1997
    Jezik - angleški
    COBISS.SI-ID - 1024039516
    DOI

vir: Physical review. E. - ISSN 1063-651X (Vol. 55, iss. 3, 1997, str. 2255-2259)
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