Article thumbnail

A simple model for anisotropic step growth

By J. Heinonen, I. Bukharev, T. Ala-Nissilä and J.M. Kosterlitz

Abstract

We consider a simple model for the growth of isolated steps on a vicinal crystal surface. It incorporates diffusion and drift of adatoms on the terrace, and strong step and kink edge barriers. Using a combination of analytic methods and Monte Carlo simulations, we study the morphology of growing steps in detail. In particular, under typical molecular beam epitaxy conditions the step morphology is linearly unstable in the model and develops fingers separated by deep cracks. The vertical roughness of the step grows linearly in time, while horizontally the fingers coarsen proportional to t0.33. We develop scaling arguments to study the saturation of the ledge morphology for a finite width and length of the terrace.Peer reviewe

Publisher: 'American Physical Society (APS)'
Year: 1998
DOI identifier: 10.1103/PhysRevE.57.6851
OAI identifier: oai:aaltodoc.aalto.fi:123456789/30957
Provided by: Aaltodoc
Journal:
Download PDF:
Sorry, we are unable to provide the full text but you may find it at the following location(s):
  • https://research.aalto.fi/file... (external link)
  • https://doi.org/10.1103/PhysRe... (external link)
  • https://research.aalto.fi/en/p... (external link)
  • https://aaltodoc.aalto.fi/hand... (external link)
  • Suggested articles


    To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.