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Density functional tight binding: application to organic and biological molecules
Author(s) -
Gaus Michael,
Cui Qiang,
Elstner Marcus
Publication year - 2013
Publication title -
wiley interdisciplinary reviews: computational molecular science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.126
H-Index - 81
eISSN - 1759-0884
pISSN - 1759-0876
DOI - 10.1002/wcms.1156
Subject(s) - tight binding , density functional theory , formalism (music) , coulomb , electronic structure , computational chemistry , organic molecules , molecule , third order , statistical physics , chemistry , computer science , physics , quantum mechanics , art , musical , visual arts , electron , philosophy , theology
In this work, we review recent extensions of the density functional tight binding (DFTB) methodology and its application to organic and biological molecules. DFTB denotes a class of computational models derived from density functional theory (DFT) using a Taylor expansion around a reference density. The first‐ and second‐order models, DFTB1 and DFTB2, have been reviewed recently ( WIREs Comput Mol Sci 2012, 2:456–465). Here, we discuss the extension to third order, DFTB3, which in combination with a modification of the Coulomb interactions in the second‐order formalism and a new parametrization scheme leads to a significant improvement of the overall performance. The performance of DFTB2 and DFTB3 for organic and biological molecules are discussed in detail, as well as problems and limitations of the underlying approximations. WIREs Comput Mol Sci 2014, 4:49–61. doi: 10.1002/wcms.1156 This article is categorized under: Electronic Structure Theory > Semiempirical Electronic Structure Methods