Unconventional MBE strategies from computer simulations for optimized growth conditions

Citation
S. Schinzer et al., Unconventional MBE strategies from computer simulations for optimized growth conditions, PHYS REV B, 60(4), 1999, pp. 2893-2899
Citations number
55
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B-CONDENSED MATTER
ISSN journal
0163-1829 → ACNP
Volume
60
Issue
4
Year of publication
1999
Pages
2893 - 2899
Database
ISI
SICI code
0163-1829(19990715)60:4<2893:UMSFCS>2.0.ZU;2-4
Abstract
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 model. Based on these investigations we propose two strategi es to optimize MBE growth. The strategies are applicable in different growt h regimes: During layer-by-layer growth one can exploit the presence of des orption in order to achieve smooth surfaces. By additional short high flux pulses of particles one can increase the growth rate and assist layer-by-la yer 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 structu res. By controlled reduction of the flux with time we achieve a fast coarse ning together with smooth step edges. [S0163-1829(99)04727-X].