Physics – Condensed Matter – Materials Science
Scientific paper
2007-11-23
Physics
Condensed Matter
Materials Science
12 pages, 1 figure
Scientific paper
10.1103/PhysRevB.77.195445
We test the accuracy of the revised Perdew-Burke-Ernzerhof exchange-correlation density functional (PBEsol) for metallic bulk and surface systems. It is shown that, on average, PBEsol yields equilibrium volumes and bulk moduli in close agreement with the former generalized gradient approximation (PBE) and two gradient level functionals derived from model system approach (LAG and AM05). On the other hand, for close-packed metal surfaces, PBEsol has the same performance as AM05, giving significantly larger surface energies than PBE and LAG.
Kokko Kalevi
Ropo M.
Vitos Levente
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