The evaluation of atomic polar tensors and Born Effective Charge (BEC) tensors from Density Functional Perturbation Theory (DFPT) has been implemented in the CP2K code package. This implementation is based on a combination of the Gaussian and plane wave approach for the description of basis functions and arising potentials. The presence of non-local pseudo-potentials has been considered, as well as contributions arising from the basis functions being centered on the atoms. Simulations of both periodic and non-periodic systems have been implemented and carried out. Dipole strengths and infrared absorption spectra have been calculated for two isomers of the tripeptide Ser–Pro–Ala using DFPT and are compared to the results of standard vibrational analyses using finite differences. The spectra are then decomposed into five subsets by employing localized molecular orbitals/maximally localized Wannier functions, and the results are discussed. Moreover, group coupling matrices are employed for visualization of results. Furthermore, the BECs and partial charges of the surface atoms of a periodic (101) anatase (TiO2) slab have been investigated in a periodic framework.
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14 March 2021
Research Article|
March 12 2021
Analytic calculation and analysis of atomic polar tensors for molecules and materials using the Gaussian and plane waves approach
Special Collection:
Special Collection in Honor of Women in Chemical Physics and Physical Chemistry
Edward Ditler
;
Edward Ditler
Department of Chemistry, University of Zurich
, Zurich, Switzerland
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Chandan Kumar
;
Chandan Kumar
Department of Chemistry, University of Zurich
, Zurich, Switzerland
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Sandra Luber
Sandra Luber
a)
Department of Chemistry, University of Zurich
, Zurich, Switzerland
a)Author to whom correspondence should be addressed: sandra.luber@chem.uzh.ch
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a)Author to whom correspondence should be addressed: sandra.luber@chem.uzh.ch
Note: This paper is part of the JCP Special Collection in Honor of Women in Chemical Physics and Physical Chemistry.
J. Chem. Phys. 154, 104121 (2021)
Article history
Received:
December 18 2020
Accepted:
February 11 2021
Citation
Edward Ditler, Chandan Kumar, Sandra Luber; Analytic calculation and analysis of atomic polar tensors for molecules and materials using the Gaussian and plane waves approach. J. Chem. Phys. 14 March 2021; 154 (10): 104121. https://doi.org/10.1063/5.0041056
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