Theory of strain derivative of electronic dielectric constant of ionic crysts |
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Authors: | O.P. Sharma H.P. Sharma Jai Shanker |
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Affiliation: | 1. Department of Physics, Agra College, Agra-282002, India |
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Abstract: | A theoretical method for evaluating the strain derivative of the electronic dielectric constant of ionic crystals has been developed. The analysis presented here is based on the shell model and takes account of the exchange charge polarizations. Values of strain derivative of the electronic constant dielectric calculated for 6 alkali halides and MgO show a remarkable agreement with experimental data on photoelastic constants. |
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