Berlin 2005 – wissenschaftliches Programm
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DY: Dynamik und Statistische Physik
DY 44: Growth and Fracture
DY 44.5: Vortrag
Dienstag, 8. März 2005, 16:45–17:00, TU H3010
Ostwald Ripening of two-dimensional island — •Axel Voigt and Frank Haußer — Crystal Growth group, research center caesar, Ludwig-Erhard-Allee 2, 53175 Bonn
Ostwald ripening in homoepitaxy in the submonolayer regime is studied by means of classical LSW theory and large-scale numerical simulations. The simulations indicate, that the coarsening kinetics of the average island size is described by a t1/a power law, where 2 ≤ a ≤ 3. For the two limiting cases of diffusion limited ripening and kinetics limited ripening the analytical results of the LSW theory are reproduced by the simulations. Besides the scaling law we also investigate island size distribution functions and the influence of anisotropic setp-edge energies and edge diffusion.