First-principles local density functional calculations were performed for a single Ag atom which was adsorbed on Pt(111), and were compared with published scanning tunnelling microscopic observations and embedded atom results. The latter calculations had predicted a small static diffusion barrier of 0.05eV, which compared badly with the present prediction of 0.20eV. The scanning tunnelling microscopic measurements had indicated a diffusion barrier of 0.16eV.

P.J.Feibelman: Surface Science Letters, 1994, 313[1-2], 801-5