Diffusion and incorporation: shape evolution during overgrowth on structured substrates

Citation
W. Braun et al., Diffusion and incorporation: shape evolution during overgrowth on structured substrates, J CRYST GR, 227, 2001, pp. 51-55
Citations number
8
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
JOURNAL OF CRYSTAL GROWTH
ISSN journal
0022-0248 → ACNP
Volume
227
Year of publication
2001
Pages
51 - 55
Database
ISI
SICI code
0022-0248(200107)227:<51:DAISED>2.0.ZU;2-2
Abstract
We simulate the surface shapes during homoepitaxial overgrowth of patterned GaAs substrates in the sector (0 0 1)(111)A. The model for the shape evolu tion is based on a diffusion equation in which the orientation-dependent pa rameters vary according to a simple model of the surface free energy of the zineblende crystal structure. Metastable pseudofacets its well as the init ial shape of the step are demonstrated to play a major role in the evolutio n of the surface during overgrowth. (C) 2001 Elsevier Science B.V. All righ ts reserved.