Abstract
Off-normal incidence piezoreflectivities of SrF 2 and BaF 2 in the 4 p and 5 p core exciton regions have been measured. The cubic, tetragonal and trigonal deformation potentials are determined. The results are interpreted by the localized excitation model; signs and magnitudes of the deformation potentials of the core excitons, as well as their energies and intensities. Slater-Condon parameters, and Coulomb and exchange interactions between electrons and holes are reasonably determined.
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