Spiral Growth and Step Edge Barriers
Materials Science
2008-03-20 v1 Statistical Mechanics
Abstract
The growth of spiral mounds containing a screw dislocation is compared to the growth of wedding cakes by two-dimensional nucleation. Using phase field simulations and homoepitaxial growth experiments on the Pt(111) surface we show that both structures attain the same characteristic large scale shape when a significant step edge barrier suppresses interlayer transport. The higher vertical growth rate observed for the spiral mounds on Pt(111) reflects the different incorporation mechanisms for atoms in the top region and can be formally represented by an enhanced apparent step edge barrier.
Keywords
Cite
@article{arxiv.0709.2327,
title = {Spiral Growth and Step Edge Barriers},
author = {A. Redinger and O. Ricken and P. Kuhn and A. Raetz and A. Voigt and J. Krug and T. Michely},
journal= {arXiv preprint arXiv:0709.2327},
year = {2008}
}
Comments
11 pages, 4 figures, partly in color