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Schlagwörter:
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Zusammenfassung:
We find spuriously large repulsive many-body contributions to binding energies of rare gas systems for the first three rungs of "Jacob’s Ladder" within Kohn-Sham density functional theory. While the description of van der Waals dimers is consistently improved by the pairwise London C6/R6 correction, inclusion of a corresponding three-body Axilrod-Teller C9/R9 term only increases the repulsive error. Our conclusions based on extensive solid state and molecular electronic structure calculations are particularly relevant for condensed phase van der Waals systems.