We present a physically motivated correlation functional belonging to the meta-generalized gradient approximation (meta-GGA) rung, which can be supplemented with long-range dispersion corrections without introducing double-counting of correlation contributions. The functional is derived by the method of constraint satisfaction, starting from an analytical expression for a real-space spin-resolved correlation hole. The model contains a position-dependent function that controls the range of the interelectronic correlations described by the semilocal functional. With minimal empiricism, this function may be adjusted so that the correlation model blends with a specific dispersion correction describing long-range contributions. For a preliminary assessment, our functional has been combined with an atom-pairwise dispersion correction and full Hartree-Fock (HF)-like exchange. Despite the HF-exchange approximation, its predictions compare favorably with reference interaction energies in an extensive set of non-covalently bound dimers.
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28 November 2012
Research Article|
November 29 2012
A first-principles-based correlation functional for harmonious connection of short-range correlation and long-range dispersion
Marcin Modrzejewski;
Marcin Modrzejewski
a)
1Faculty of Chemistry,
University of Warsaw
, 02-093 Warsaw, Pasteura 1, Poland
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Michał Lesiuk;
Michał Lesiuk
1Faculty of Chemistry,
University of Warsaw
, 02-093 Warsaw, Pasteura 1, Poland
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Łukasz Rajchel;
Łukasz Rajchel
2Interdisciplinary Centre for Mathematical and Computational Modelling,
University of Warsaw
, 02-093 Warsaw, Pawińskiego 5a, Poland
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Małgorzata M. Szczęśniak;
Małgorzata M. Szczęśniak
3Department of Chemistry,
Oakland University
, Rochester, Michigan 48309-4477, USA
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Grzegorz Chałasiński
Grzegorz Chałasiński
1Faculty of Chemistry,
University of Warsaw
, 02-093 Warsaw, Pasteura 1, Poland
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a)
Electronic mail: modrzej@tiger.chem.uw.edu.pl.
J. Chem. Phys. 137, 204121 (2012)
Article history
Received:
September 25 2012
Accepted:
November 06 2012
Citation
Marcin Modrzejewski, Michał Lesiuk, Łukasz Rajchel, Małgorzata M. Szczęśniak, Grzegorz Chałasiński; A first-principles-based correlation functional for harmonious connection of short-range correlation and long-range dispersion. J. Chem. Phys. 28 November 2012; 137 (20): 204121. https://doi.org/10.1063/1.4768228
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