Campus Units
Mathematics, Physics and Astronomy, Ames Laboratory
Document Type
Article
Publication Version
Published Version
Publication Date
1-2004
Journal or Book Title
Physical Review B
Volume
69
Issue
3
First Page
035410-1
Last Page
035410-14
DOI
10.1103/PhysRevB.69.035410
Abstract
During submonolayer homoepitaxy, instability in the shapes of growing two-dimensional islands can develop due to the diffusion-limited aggregation of deposited adatoms at their edges. However, in metal (100) systems, periphery diffusion is typically efficient, quenching this shape instability, and resulting in simple near-square or near-rectangular shapes of isolated islands. Despite this feature, growth coalescence shapes resulting from collision of two or more growing islands are nontrivial. These coalescence shapes are elucidated here by developing three complementary formulations: (i) suitable atomistic lattice-gas models analyzed by kinetic Monte Carlo simulation; (ii) deterministic rate equations for the dynamics of kinks along island step edges; and (iii) continuum theories for step-edge evolution. Characterization of coalescence shapes is important as they affect interlayer transport during multilayer growth. Such a characterization is also necessary to enable coarse-grained modeling of film growth with a realistic treatment of the evolution of island edge morphologies, e.g., using level-set methods.
Copyright Owner
American Physical Society
Copyright Date
2004
Language
en
File Format
application/pdf
Recommended Citation
Li, Maozhi and Evans, James W., "Growth coalescence shapes for islands during metal (100) homoepitaxy" (2004). Mathematics Publications. 8.
https://lib.dr.iastate.edu/math_pubs/8
Comments
This article is from Physical Review B 69 (2004): 035410, doi:10.1103/PhysRevB.69.035410 . Posted with permission.