Local field effects on dielectric properties of solids Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/j3860904c

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  • Local field effects on the dielectric properties of solids have been studied for three-dimensional and two-dimensional crystals by using two kinds of dipole models: an atomic dipole model in which dipoles coincide with atom sites and a bond dipole model in which dipoles are placed along bond directions. Local fields at the dipole sites and at the interstitial sites are calculated in a self-consistent manner. Both the three and two dimensional model give results in the form of the classical Lorentz-Lorenz relation. The formulas for calculating the dipole sums have been obtained by applying the Born-Ewald method in three and two dimensions. Lorentz factors for several three and two dimensional crystal structures have been calculated. Elasto-optic (Pockels) constants have been studied for the rare gas solid Xenon. Pockels constants have also been calculated for some selected tetrahedral crystals using both dipole models.
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