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28 March 2024
 
  » arxiv » 1010.6163

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Toward an all-round semi-local potential for the electronic exchange
Micael J.T. Oliveira ; Esa Räsänen ; Stefano Pittalis ; Miguel A.L. Marques ;
Date 29 Oct 2010
AbstractWe test local and semi-local density functionals for the electronic exchange for a variety of systems including atoms, molecules, and atomic chains. In particular, we focus on a recent universal extension of the Becke-Johnson exchange potential [E. R"as"anen, S. Pittalis, and C. R. Proetto, J. Chem. Phys. 132, 044112 (2010)]. It is shown that when this potential is used together with the Becke-Roussel approximation to the Slater potential [A. D. Becke and M. R. Roussel, Phys. Rev. A 39, 3761 (1989)], a good overall agreement is obtained with experimental and numerically exact results for several systems, and with a moderate computational cost. Thus, this approximation is a very promising candidate in the quest for a simple and all-round semi-local potential.
Source arXiv, 1010.6163
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