Pyramid growth without deposition noise

Citation
Dc. Vernon et al., Pyramid growth without deposition noise, PHYS REV B, 59(23), 1999, pp. 15523-15527
Citations number
33
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B-CONDENSED MATTER
ISSN journal
01631829 → ACNP
Volume
59
Issue
23
Year of publication
1999
Pages
15523 - 15527
Database
ISI
SICI code
0163-1829(19990615)59:23<15523:PGWDN>2.0.ZU;2-P
Abstract
Several models of molecular-beam epitaxy, both atomistic and ones based on Langevin equations, have as one of their generic growth scenarios the forma tion of three-dimensional structures such as mounds or pyramids. The charac teristic size R of these structures increases as a function of deposition t ime with a power law R similar to t(n). In order to investigate the depende nce of the growth exponent n on the characteristics of the fluctuations of the deposition flux we compare results of Monte-Carlo simulations for rando m deposition and for deposition on an artificially constructed deterministi c sequence of sites. Although the latter algorithm leads to much smaller he ight fluctuations on each site, the growth exponent in both cases is found to be dose to 0.25.