Regensburg 2004 – wissenschaftliches Programm

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DY: Dynamik und Statistische Physik

DY 46: Poster

DY 46.69: Poster

Donnerstag, 11. März 2004, 16:00–18:00, Poster D

Shape of mounds and scaling behaviour in unstable epitaxial crystal growth — •Markus Walther, Sebastian Weber, and Michael Biehl — Institut für Theoretische Physik,Universität Würzburg, Am Hubland, 97074 Würzburg

We study the influence of an Ehrlich-Schwoebel like barrier at corners in the diffusion of adatoms along step edges. The presence of an infinite barrier determines the shape of mounds in unstable growth and the coarsening dynamics of the surface.

The investigation is realized by two different methods of Monte Carlo simulations leading to similar results: Kinetic Monte Carlo simulations and a single particle representation. We investigate the effect of a finite barrier and its role in a dynamical phase transition with respect to surface morphology and scaling behaviour.