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Nucleation on a stepped surface with an Ehrlich-Schwöbel barrier
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SYSNO ASEP 0437043 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Nucleation on a stepped surface with an Ehrlich-Schwöbel barrier Author(s) Chromcová, Zdeňka (FZU-D) RID
Tringides, M.C. (US)
Chvoj, Zdeněk (FZU-D)Source Title Journal of Physics-Condensed Matter. - : Institute of Physics Publishing - ISSN 0953-8984
Roč. 25, č. 26 (2013), "265003-1"-"265003-13"Number of pages 13 s. Language eng - English Country GB - United Kingdom Keywords flow growth ; epitaxy ; transition Subject RIV BM - Solid Matter Physics ; Magnetism R&D Projects IAA100100903 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) GPP204/10/P331 GA ČR - Czech Science Foundation (CSF) ME09048 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support FZU-D - RVO:68378271 UT WOS 000320329400004 EID SCOPUS 84879311994 DOI https://doi.org/10.1088/0953-8984/25/26/265003 Annotation During deposition on a stepped surface the growth mode depends on the conditions such as temperature T, deposition rate F and width of the terraces w. In this work we studied the influence of all the above mentioned characteristics using the kinetic Monte Carlo (kMC) technique. We concentrated on the conditions on the terrace at the moment of the first nucleation. The critical density of monomers for nucleation eta(m) decreases with the width of the terrace and the nucleation starts at surprisingly low densities of monomers. We tested several definitions of the critical width for nucleation w(c) used in various articles in the past and we compared our results with results of the analytical steady-state mean-field model (Ranguelov and Altman 2007 Phys. Rev. B 75 245419). To check how the simplified assumption about the steady-state regime during deposition influences the resulting dependence of w(c) similar or equal to (D/F)(kappa), we set and also solved a time-dependent analytical model. This analytical model as well as kMC predict that w(c) similar or equal to (D/F)(1/5). Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2015
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