https://doi.org/10.1140/epjb/e2008-00367-6
Non-equilibrium phase transition of the fully frustrated square lattice Coulomb gas model
1
Department of Applied Physics, Zhejiang University of Technology, Hangzhou, 310023, P.R. China
2
Department of Physics, Zhejiang University, Hangzhou, 310027, P.R. China
3
CSTCMP and Department of Physics, Zhejiang Normal University, Jinhua, 321004, P.R. China
Corresponding author: a nieqingmiao@zjut.edu.cn
Received:
28
March
2008
Revised:
25
July
2008
Published online:
27
September
2008
The non-equilibrium phase transitions of the fully frustrated (f = 1/2) square lattice Coulomb gas (CG) model driven by external electrical fields are studied in the framework of the short-time dynamic scaling approach. The critical temperature Tc, the static and dynamic critical exponents 2β/ν, ν, and z are obtained for several small driving fields. The results show that Tc decreases with the increase of electric field, and 2β/ν and z are strongly dependent on the external electric field. Interestingly, contrary to the equilibrium case, in the presence of small electric field, the calculated exponent ν is close to that in pure 2D Ising model, which provides numerical evidence that external electric field may change the universality class of the f = 1/2 CG system.
PACS: 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
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2008