Abstract.
The non-equilibrium phase transitions of the fullyfrustrated (f = 1/2) square lattice Coulomb gas (CG) modeldriven by external electrical fields are studied in the frameworkof the short-time dynamic scaling approach. The criticaltemperature Tc, the static and dynamic critical exponents2β/ν, ν, and z are obtained for several smalldriving fields. The results show that Tc decreases with theincrease of electric field, and 2β/ν and z arestrongly dependent on the external electric field. Interestingly,contrary to the equilibrium case, in the presence of smallelectric field, the calculated exponent ν is close to that inpure 2D Ising model, which provides numerical evidence thatexternal electric field may change the universality class of thef = 1/2 CG system.
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Nie, QM., Zhou, W. & Chen, QH. Non-equilibrium phase transition of the fully frustrated square lattice Coulomb gas model. Eur. Phys. J. B 65, 485 (2008). https://doi.org/10.1140/epjb/e2008-00367-6
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DOI: https://doi.org/10.1140/epjb/e2008-00367-6