Surface strain effects on adatom kinetics and self-assembly
| Autor: | Kyeongjae Cho, R. F. Sabiryanov, Bruce M. Clemens, Mats I. Larsson |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Surface diffusion
Chemistry Monte Carlo method Kinetics Crystal growth Surfaces and Interfaces Condensed Matter Physics Surfaces Coatings and Films Condensed Matter::Materials Science Chemical physics Monolayer Materials Chemistry Physical chemistry Diffusion current Kinetic Monte Carlo Diffusion (business) |
| Zdroj: | Surface Science. 536:L389-L395 |
| ISSN: | 0039-6028 |
| DOI: | 10.1016/s0039-6028(03)00579-x |
| Popis: | Strain-assisted self-assembly of nanostructures is investigated by means of kinetic Monte Carlo (KMC) simulations of suitable model systems. We show that the local strain dependence of the binding site and saddle-point energies with slopes CB and CSP, respectively, is critical for the adatom surface diffusion. The driving forces of surface patterning are identified. If CB≠0 and CSP=0, the diffusion is thermodynamically driven and if CB=0 and CSP≠0, it is kinetically driven. By varying these slopes the direction of the diffusion current can be controlled. The nanopatterning is quantified by evaluating the corresponding power-density spectra. |
| Databáze: | OpenAIRE |
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