Models for adatom diffusion on fcc(001) metal surfaces

Abstract

We present a class of models that describe self diffusion on several fcc(001) metal substrates within a common framework. The models are found to apply well for Cu(001), Ag(001), Au(001), Ni(001) and Pd(001).For each of these metals the models can be used to estimate the activation energy of any diffusion process using a few basic parameters which may be obtained from experiments, ab-initio or semi-empirical calculations. To demonstrate the approach, the parameters of the models are optimized to describe self-diffusion on the (001) surface, by comparing the energy barriers to a full set of barriers obtained from semi-empirical potentials via the embedded atom method (EAM). It is found that these models with at most four parameters,provide a good description of the full landscape of hopping energy barriers on FCC(001) surfaces. The main features of the diffusion processes revealed by EAM calculations are quantitatively reproducible by the models.

arXiv comment14 pages, 15 figures

References in corpus (5)

• Self-diffusion of adatoms, dimers, and vacancies on Cu(100)
• Submonolayer Epitaxy Without A Critical Nucleus
• Scaling of Island Growth in Pb Overlayers on Cu(001)
• Effects of Small Island Mobility on Growth in Molecular Beam Epitaxy
• A simple model of epitaxial growth

Cited by in corpus (9)

• Electromigration-Induced Flow of Islands and Voids on the Cu(001) Surface
• Competing mechanisms for step meandering in unstable growth
• Epitaxial growth of Cu on Cu(001): experiments and simulations
• Scaling in reversible submonolayer deposition
• Effect of kink-rounding barriers on step edge fluctuations
• Effects of deposition dynamics on epitaxial growth
• Phase Field Modelling of Submonolayer Epitaxial Growth
• Single-layer metal-on-metal islands driven by strong time-dependent forces
• Controlling the shape of small clusters with and without macroscopic fields