Piezoreflectivity Spectra under Uniaxial Stressesof Core Excitons in RbCl

Abstract

Piezoreflectivity spectra of Rb + core excitons in RbCl were measured at liquid N 2 temperature and splitting energies due to uniaxial deformations were obtained. The splitting energies were calculated with the use of the localized excitation model given by Satoko and Sugano. The calculated values were in agreement with experimental results under the trigonal deformation and the localized excitation model was shown to be applicable to the analysis of piezoreflectivity spectra. From the splitting energies determined under the tetragonal deformation, one electron expectation values of potential field energy were obtained. The one electron expectation values were discussed in terms of a point charge model and atomic functions.