Non-equilibrium phase transition of the fully frustrated square lattice Coulomb gas model

Q.-M. Nie (), W. Zhou and Q.-H. Chen

The European Physical Journal B: Condensed Matter and Complex Systems, 2008, vol. 65, issue 4, 485-489

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 T c , the static and dynamic critical exponents2β/ν, ν, and z are obtained for several smalldriving fields. The results show that T c 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. Copyright Springer 2008

Keywords: 64.60.A- Specific approaches applied to studies of phase transitions; 64.70.qj Dynamics and criticality; 64.60.De Statistical mechanics of model systems (search for similar items in EconPapers)
Date: 2008
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DOI: 10.1140/epjb/e2008-00367-6

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