Physics – Condensed Matter – Materials Science
Scientific paper
2007-03-13
Physics
Condensed Matter
Materials Science
slightly revised version: 4 pages including 3 figures; related publications can be found at http://www.fhi-berlin.mpg.de/th/th
Scientific paper
10.1103/PhysRevLett.99.169903
It is shown that the errors of present-day exchange-correlation (xc) functionals are rather short ranged. For extended systems the correction can therefore be evaluated by analyzing properly chosen clusters and employing highest-quality quantum chemistry methods. The xc correction rapidly approaches a universal dependence with cluster size. The method is applicable to bulk systems as well as to defects in the bulk and at surfaces. It is demonstrated here for CO adsorption at transition-metal surfaces, where present-day xc functionals dramatically fail to predict the correct adsorption site, and for the crystal bulk cohesive energy.
Hu Qing-Miao
Reuter Karsten
Scheffler Matthias
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