Depinning phase transition in two-dimensional clock model with quenched randomness

Abstract

With Monte Carlo simulations, we systematically investigate the depinning phase transition in the two-dimensional driven random-field clock model. Based on the short-time dynamic approach, we determine the transition field and critical exponents. The results show that the critical exponents vary with the form of the random-field distribution and the strength of the random fields, and the roughening dynamics of the domain interface belongs to the new subclass with $\zeta \ne {\zeta }_{loc}\ne {\zeta }_s$ and ${\zeta }_{loc}\ne 1$. More importantly, we find that the transition field and critical exponents change with the initial orientations of the magnetization of the two ordered domains.

23 pages, 14 figures, 4 tables. arXiv admin note: text overlap with arXiv:1202.6486

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Cited by in corpus (1)

• Corrections to scaling in the dynamic approach to the phase transition with quenched disorder