Step-edge barriers on GaAs(001)

Spiral growth and step edge barriers.

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 large scale shape when a significant step-edge barrier suppresses interlayer transport. The higher vertical growth rate of the sp...

Nucleation and step-edge barriers always destabilize step-flow growth of a vicinal surface

We consider the effect of nucleation on a one-dimensional stepped surface, finding that step-flow growth is metastable for any strength of the additional step-edge barrier. The surface is made unstable by the formation of a critical nucleus, whose lateral size is related to the destabilization process on a high-symmetry surface. Arguments based on a critical nucleus of height two, which suggest...

Flat-surface, step-edge, facet–facet, and facet–step diffusion barriers in growth of a Pb mesa

0039-6028/$ see front matter 2008 Elsevier B.V. A doi:10.1016/j.susc.2008.05.009 * Corresponding author. Present address: IPRT Department of Energy, 307D Wilhelm Hall, Ames, IA E-mail address: [email protected] (Y. Han) We obtain important energy parameters for understanding growth kinetics of a faceted Pb mesa. Specifically, extensive calculations of diffusion barriers are performed for a...

Direct measurements of island growth and step-edge barriers in colloidal epitaxy.

Epitaxial growth, a bottom-up self-assembly process for creating surface nano- and microstructures, has been extensively studied in the context of atoms. This process, however, is also a promising route to self-assembly of nanometer- and micrometer-scale particles into microstructures that have numerous technological applications. To determine whether atomic epitaxial growth laws are applicable...

Supporting Online Material for Direct Measurements of Island Growth and Step-Edge Barriers in Colloidal Epitaxy