An efficient a posteriori treatment for dispersion interaction in density-functional-based tight binding

Lyuben Zhechkov, Thomas Heine, Serguei Patchkovskii, Gotthard Seifert, Helio A. Duarte

Research output: Contribution to journalArticle

222 Citations (Scopus)

Abstract

The performance of density functional theory (DFT) (VWN-LDA, PBE-GGA, and B3LYP hybrid functionals), density-functional-based tight binding (DFTB), and ab initio methods [HF, MP2, CCSD, and CCSD(T)] for the treatment of London dispersion is investigated. Although highly correlated ab initio methods are capable of describing this phenomenon, if they are used with rather large basis sets, DFT methods are found to be inadequate for the description of H 2/PAH (polycyclic aromatic hydrocarbon) interactions. As an alternative approach, an a posteriori addition of a van der Waals term to DFTB is proposed. This method provides results for H2/PAH interactions in close agreement with MP2 and higher-level ab initio methods. Bulk properties of graphite also compare well with the experimental data.

Original languageEnglish
Pages (from-to)841-847
Number of pages7
JournalJournal of Chemical Theory and Computation
Volume1
Issue number5
DOIs
Publication statusPublished - 2005

All Science Journal Classification (ASJC) codes

  • Computer Science Applications
  • Physical and Theoretical Chemistry

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