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arxiv: 0707.2088 · v2 · submitted 2007-07-13 · ❄️ cond-mat.other · cond-mat.mtrl-sci

Generalized gradient approximation for solids and their surfaces

classification ❄️ cond-mat.other cond-mat.mtrl-sci
keywords gradientgeneralizedsolidssurfacesapproximationapproximationsatomicbias
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Successful modern generalized gradient approximations (GGA) are biased toward atomic energies. Restoration of the first-principles gradient expansion for the exchange energy over a wide range of density gradients eliminates this bias. We introduce PBEsol, a revised Perdew-Burke-Ernzerhof GGA that improves equilibrium properties for many densely-packed solids and their surfaces.

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