PMID: 11909137Mar 23, 2002Paper

First-order depinning transition of a driven interface in disordered media

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
Kwangho ParkIn-mook Kim Im

Abstract

We introduce a simple growth model which exhibits a first-order pinning-depinning (PD) transition in disordered media. In our model, a first-order PD transition is triggered by the local inertia force F(l)=pLv macro where p denotes a constant between 0 and 1, L is the system size, and v macro is the average velocity in a local region of the growing interface. If p<p(c), our model shows a continuous PD transition. However, if p>p(c), our model shows a first-order PD transition. We measure the critical exponents characterizing the dynamical behavior of our model and explain how a first-order PD transition can occur if p>p(c). Besides the PD transitions, our model exhibits another phase transition from a fluctuating to a nonfluctuating interface with a constant velocity.

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Citations

Oct 4, 2003·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Kwangho ParkIn-Mook Kim

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