Physics – Condensed Matter – Statistical Mechanics
Scientific paper
1999-03-19
Physics
Condensed Matter
Statistical Mechanics
19 pages, 7 figures, submitted to Phys. Rev. B
Scientific paper
10.1103/PhysRevB.60.2893
We investigate the influence of step edge diffusion (SED) and desorption on Molecular Beam Epitaxy (MBE) using kinetic Monte-Carlo simulations of the solid-on-solid (SOS) model. Based on these investigations we propose two strategies to optimize MBE growth. The strategies are applicable in different growth regimes: During layer-by-layer growth one can exploit the presence of desorption in order to achieve smooth surfaces. By additional short high flux pulses of particles one can increase the growth rate and assist layer-by-layer growth. If, however, mounds are formed (non-layer-by-layer growth) the SED can be used to control size and shape of the three-dimensional structures. By controlled reduction of the flux with time we achieve a fast coarsening together with smooth step edges.
Biehl Michael
Kinzel Wolfgang
Schinzer Stefan
Sokolowski Marcin
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