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

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

2000-02-18

arxiv.org/abs/cond-mat/0002285v1

Physics

Condensed Matter

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

Scientific paper

10.1103/PhysRevB.61.13277

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.

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