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Efficient calculation of van der Waals dispersion coefficients with time-dependent density functional theory in real time: application to polycyclic aromatic hydrocarbons

Authors: M.A.L. Marques, A. Castro, G. Malloci, G. Mulas, and S. Botti

Ref.: J. Chem. Phys. 127, 014107 (2007)

Abstract: The van der Waals dispersion coefficients of a set of polycyclic aromatic hydrocarbons, ranging in size from the single-cycle benzene to circumovalene (C66H20), are calculated with a real-time propagation approach to time-dependent density functional theory (TDDFT). In the non-retarded regime, the Casimir-Polder integral is employed to obtain C6, once the dynamic polarizabilities have been computed at imaginary frequencies with TDDFT. On the other hand, the numerical coefficient that characterizes the fully retarded regime is obtained from the static polarizabilities. This ab initio strategy has favorable scaling with the size of the system -- as demonstrated by the size of the reported molecules -- and can be easily extended to obtain higher order van der Waals coefficients.

Citations: 28 (Google scholar)

DOI: 10.1063/1.2746031

URL: arxiv.org

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Bibtex:

@article{Marques_2007,
	doi = {10.1063/1.2746031},
	url = {https://doi.org/10.1063%2F1.2746031},
	year = 2007,
	month = {jul},
	publisher = {{AIP} Publishing},
	volume = {127},
	number = {1},
	pages = {014107},
	author = {Miguel A. L. Marques and Alberto Castro and Giuliano Malloci and Giacomo Mulas and Silvana Botti},
	title = {Efficient calculation of van der Waals dispersion coefficients with time-dependent density functional theory in real time: Application to polycyclic aromatic hydrocarbons},
	journal = {The Journal of Chemical Physics}
}