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Growth of unstable interfaces in disordered media
Lacasta Palacio, Ana María; Ramírez Piscina, Laureano; Casademunt i Viader, Jaume; Hernández Machado, Aurora; Rodríguez Díaz, Miguel Ángel
Universitat de Barcelona
The effects of a disordered medium in the growth of unstable interfaces are studied by means of two local models with multiplicative and additive quenched disorder, respectively. For short times and large pushing the multiplicative quenched disorder is equivalent to a time-dependent noise. In this regime, the linear dispersion relation contains a destabilizing contribution introduced by the noise. For long times, the interface always gets pinned. We model the systematics of the pinned shapes by means of an effective nonlinear model. These results show good agreement with numerical simulations. For the additive noise we find numerically that a depinning transition occurs.
2011-07-26
Física estadística
Termodinàmica
Sistemes dinàmics diferenciables
Superfícies (Física)
Interfícies (Ciències físiques)
Nanotecnologia
Statistical physics
Thermodynamics
Differentiable dynamical systems
Surfaces (Physics)
Interfaces (Physical sciences)
Nanotechnology
(c) The American Physical Society, 1998
Article
The American Physical Society
         

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