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Phase diagram of a driven interacting three-state lattice gas

E. Lyman·B. Schmittmann
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Abstract

We present Monte Carlo simulations of a three-state lattice gas, half-filled with two types of particles which attract one another, irrespective of their identities. A bias drives the two particle species in opposite directions, establishing and maintaining a non-equilibrium steady state. We map out the phase diagram at fixed bias, as a function of temperature and fraction of the second species. As the temperature is lowered, a continuous transition occurs, from a disordered homogeneous into two distinct strip-like ordered phases. Which of the latter is selected depends on the admixture of the second species. A first order line separates the two ordered states at lower temperatures, emerging from the continuous line at a non-equilibrium bicritical point. For intermediate fraction of the second species, all three phases can be observed.

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E. Lyman, B. Schmittmann. 2002-02-13. Phase diagram of a driven interacting three-state lattice gas. https://doi.org/10.1088/0305-4470%2F35%2F16%2F102

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