Eur. Phys. J. B 65, 485-489 (2008)
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

Abstract

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 T_c, the static and dynamic critical exponents 2β/ν, ν, and z are obtained for several small driving fields. The results show that T_c 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.