Analytical determination of the Landau-Ginzburg parameters of (100) metal homoepitaxial systems

G. Petsos () and H. M. Polatoglou

The European Physical Journal B: Condensed Matter and Complex Systems, 2006, vol. 54, issue 4, 449-456

Abstract: In the initial stages of homoepitaxial growth on the (100) surface of metals such as Ag, Fe, Cu, Ni, and Pd, where the clean surface does not reconstruct, two-dimensional islands with compact, near-square shapes are formed. In order to determine the phenomenological material parameters of the nonlinear and nonlocal Landau-Ginzburg theory, which describes the metal homoepitaxial systems mentioned above, an atomistic model for these systems is developed. Based on this model, we derive analytical relationships between the Landau-Ginzburg parameters A, B, C, and D, and the parameters of the homoepitaxial system (such as coverage, first-neighbour interaction energy, etc.). We find that the Landau-Ginzburg parameters of the system depend on the specific material as well as on the coverage of the surface. We then apply the method to the Ag/Ag(100) system. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2006

Keywords: 68.47.De Metallic surfaces, 61.50.Ah Theory of crystal structure, crystal symmetry; calculations and modeling, 64.60.Qb Nucleation, (search for similar items in EconPapers)
Date: 2006
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DOI: 10.1140/epjb/e2007-00023-9

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