Surface strain effects on adatom kinetics and self-assembly

M. I. Larsson, R. F. Sabiryanov, K. Cho, B. M. Clemens

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)L389-L395
JournalSurface Science
Volume536
Issue number1-3
DOIs
StatePublished - Jun 20 2003

Keywords

  • Adatoms
  • Monte Carlo simulations
  • Self-assembly
  • Surface diffusion

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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