Adsorption of Pt on Ni(111) surface: introduction of an effective pair interaction model

By means of potentials derived from the second-moment approximation to the tight-binding model, isolated Pt adatom properties on the vicinal Ni (997) surface are investigated. The comparison with the Ni adsorption on the vicinal Pt(997) shows that the fcc and hcp sites are energetically very close. A promising effective pair interaction model is developed in order to study the surface diffusion of Pt adatoms in the presence of an adisland on Ni(111) which will be very useful to understand the growth phenomena in kinetic calculations.