Abstract
Using an energetic model derived from the electronic structure, we study the stability of the various terminations of Pt 1− c Sn c (111) for 0< c<0.3, both in the disordered and in the ordered L1 2 structure. Moreover, using a kinetic version of the model we reproduce the formation of different surface alloys obtained experimentally by depositing Sn Pt(111) . The relation between the equilibrium isotherm and the surface alloys is then discussed via the local equilibrium concept.
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