Dresden 2003 – wissenschaftliches Programm

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DY: Dynamik und Statistische Physik

DY 46: Poster

DY 46.71: Poster

Donnerstag, 27. März 2003, 15:30–18:00, P1

Corner barriers in unstable epitaxial crystal growth — •Sebastian Weber und Michael Biehl — Institut für Theoretische Physik, Julius-Maximilians-Universität Würzburg, Am Hubland, D-97074 Würzburg

We study the influence of an Ehrlich-Schwoebel like barrier at corners in the diffusion of adatoms along step edges. It has been demonstrated that the presence of an infinite barrier determines both the shape of mounds in unstable growth, as well as the coarsening dynamics of the surface, see e.g. [1]. By means of Kinetic Monte Carlo simulations, we investigate the effect of a finite barrier and its role in a dynamical phase transition with respect to surface morphology and scaling behaviour.

[1] S. Schinzer et al., Surface Science 439, 191 (1999)