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Efficient Calculations of Molecular Linear Response Properties for Spectral Regions
Linköping University, Department of Physics, Chemistry and Biology, Computational Physics. Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Computational Physics. Linköping University, The Institute of Technology.
2014 (English)In: Journal of Chemical Theory and Computation, ISSN 1549-9618, E-ISSN 1549-9626, Vol. 10, no 6, 2449-2455 p.Article in journal (Refereed) Published
Abstract [en]

Molecular spectra can be determined from molecular response functions, by solving the so-called damped response equations using the complex polarization propagator approach. The overall structure of response equations is identical for variational wave functions such as the Hartree-Fock, multi-configuration self-consistent field, and Kohn-Sham density functional theory, and the key program module is the linear response equation solver. We present an implementation of the solver using the algorithm with symmetrized vectors, optimized for addressing spectral regions of a width of some 5-10 eV and a resolution below 0.1 eV. The work is illustrated by the consideration of UV-vis as well as near carbon K -edge absorption spectra of the C-60 fullerene. We demonstrate that it is possible to converge tightly response equations for hundreds of optical frequencies in resonance regions of the spectrum at a cost not much exceeding the solution of a single response equation in the nonresonant region. Our work is implemented in the molecular orbital based module of the Dalton program and serves as a documentation of the code distributed in the Dalton2013 release version.

Place, publisher, year, edition, pages
American Chemical Society , 2014. Vol. 10, no 6, 2449-2455 p.
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-108930DOI: 10.1021/ct500114mISI: 000337199300023OAI: oai:DiVA.org:liu-108930DiVA: diva2:734200
Available from: 2014-07-15 Created: 2014-07-13 Last updated: 2017-12-05

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Kauczor, JoannaNorman, Patrick

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