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Phys. Rev. Lett. 68, 30483051 (1992)
[Issue 20 18 May 1992 ]
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Kinetic growth with surface diffusion: The scaling aspect
- Hong Yan
- Department of Materials Science and Engineering, Roberts Hall, FB-10, University of Washington, Seattle, Washington 98195
Received 27 December 1991We present computer simulations of kinetic growth models with a physically realistic surface diffusion process and without desorption. The results demonstrate that the asymptotic statistical scaling properties of the surface generated under these conditions are still correctly depicted by the Kardar-Parisi-Zhang (KPZ) theory. We show that surface diffusion nevertheless introduces a novel type of scaling at early times which will eventually crossover to the KPZ scaling. Furthermore, we make a clear connection between kinetic growth models and molecular-beam-epitaxy processes by illustrating the impact of surface diffusion on reducing the concentration of bulk defects.
©1992 The American Physical Society
URL: http://link.aps.org/abstract/PRL/v68/p3048
DOI: 10.1103/PhysRevLett.68.3048
PACS: 61.50.Cj, 05.40.+j, 68.35.Fx, 68.55.Jk
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