Density Functional Theory of Epitaxial Growth of Metals

Details Density Functional Theory of Epitaxial Growth of Metals Density Functional Theory of Epitaxial Growth of Metals

1997-02-11

arxiv.org/abs/cond-mat/9702094v1

Physics

Condensed Matter

55 pages, 20 figures, to be published "Growth of Ultrathin Epitaxial Layers", The Chemical Physics of Soild Surfaces, Vol. 8,

Scientific paper

This chapter starts with a summary of the atomistic processes that occur during epitaxy. We then introduce density functional theory (DFT) and describe its implementation into state-of-the-art computations of complex processes in condensed matter physics and materials science. In particular we discuss how DFT can be used to calculate parameters of microscopic processes such as adsorption and surface diffusion, and how they can be used to study the macroscopic time and length scales of realistic growth conditions. This meso- and macroscopic regime is described by the ab initio kinetic Monte Carlo approach. We discuss several specific theoretical studies that highlight the importance of the different diffusion mechanisms at step edges, the role of surfactants, and the influence of surface stress. The presented results are for specific materials (namely silver and aluminum), but they are explained in simple physical pictures suggesting that they also hold for other systems.

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