A Crossover Between Two Growth Universality Classes

T. J. da Silva ()
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T. J. da Silva: Departamento de Física, Universidade Federal de Minas Gerais, C. P. 702, 30161-970, Belo Horizonte/MG, Brazil

International Journal of Modern Physics C (IJMPC), 1998, vol. 09, issue 06, 815-819

Abstract: We investigated two simple SOS growth models where the roughness of the profile is softened by surface relaxation or by refuse. In the first case, a particle can relax until it reaches a local minimum and this process is described by a linear equation. In the second case, a particle can be evaporated and this process is described by the KPZ equation. In this work, we have mixed both the models in the same growth process. Numerical simulations in(1+1)-dimensions show a process that for short times behaves as the surface relaxation model and for intermediate times, behaves as the refuse model. Numerical simulations indicate for this crossover a dynamical exponentz≈1.4, indicating that it is in the KPZ universality class.

Keywords: Universality Class; Growth Processes; Scaling Relation; KPZ Equation (search for similar items in EconPapers)
Date: 1998
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DOI: 10.1142/S0129183198000741

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