Stochastic model for surface erosion via ion sputtering: Dynamical evolution from ripple morphology to rough morphology.
作者： Rodolfo Cuerno , Hernán A. Makse , Silvina Tomassone , Stephen T. Harrington , H. Eugene Stanley
DOI: 10.1103/PHYSREVLETT.75.4464
关键词: Statistical physics 、 Continuum (measurement) 、 Physics 、 Ripple 、 Stochastic modelling 、 Ion sputtering 、 Scaling
摘要: Surfaces eroded by ion sputtering are sometimes observed to develop morphologies which either ripple (periodic) or rough (nonperiodic). We introduce a discrete stochastic model that allows us interpret these experimental observations within unified framework. find periodic morphology characterizes the initial stages of evolution, whereas surface displays self-affine scaling in later time regime. Further, we argue continuum equation describing height is noisy version Kuramoto-Sivashinsky equation.
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