Ab initio Hartree-Fock Born effective charges of LiH, LiF, LiCl, NaF, and NaCl

Abstract

We use the Berry-phase-based theory of macroscopic polarization of dielectric crystals formulated in terms of Wannier functions, and state-of-the-art Gaussian basis functions, to obtain benchmark ab initio Hartree-Fock values of the Born effective charges of ionic compounds LiH, LiF, LiCl, NaF, and NaCl. We find excellent agreement with the experimental values for all the compounds except LiCl and NaCl, for which the disagreement with the experiments is close to 10% and 16%, respectively. This may imply the importance of many-body effects in those systems.

11 pages, Revtex, 2 figures (included), to appear in Phys. Rev. B April 15, 2000

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Cited by in corpus (3)

• Ab initio Wannier-function-based correlated calculations of Born effective charges of crystalline Li${}_2$O and LiCl
• Ab initio Wannier-function-based many-body approach to Born charge of crystalline insulators
• Impact of Exchange-Correlation Functionals on Predictions of Phonon Hydrodynamics: A Study of Fluorides, Chlorides, and Hydrides