Density functional analysis of key energetics in metal homoepitaxy: Quantum size effects in periodic slab calculations
|Title||Density functional analysis of key energetics in metal homoepitaxy: Quantum size effects in periodic slab calculations|
|Publication Type||Journal Article|
|Year of Publication||2010|
|Journal Title||Physical Review B|
|Keywords||ab-initio, adsorbate interactions, all-electron, initio molecular-dynamics, island nucleation, self-diffusion, SURFACE-DIFFUSION, thin-film growth, total-energy calculations, wave basis-set|
Adspecies terrace diffusion barriers, pair interaction energies, and formation energies control island nucleation and growth during deposition and postdeposition coarsening in metal homoepitaxial systems. Thus, accurate theoretical determination of such energies is key for predicting behavior or for interpreting experiments. Often energies are obtained from density-functional theory using slab geometries. However, we find surprisingly strong variation in these energies with slab thickness due to quantum size effects, and also slow convergence to the bulk limit. Thus, many previously reported values deviate significantly from bulk limit, a feature corrected in the current study focusing on Ag and Cu surfaces.
|URL||<Go to ISI>://000274002300105|