Volume dependence of refractive index and electronic polarizabilities of alkali halide crystals

Dutt, N. V. K.; Agrawal, G. G.; Shanker, J.

doi:10.1016/0038-1098(85)90574-5

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Other Ionic Alloys and Conclusion1

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Cited by 10 publications

(2 citation statements)

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“…The photoelastic behaviour, i.e. the volume dependence of dielectric constant and refractive index, has been explained successfully [42,44] on the basis of the Yamashita-Kurasawa dielectric theory by taking into account the change in electronic polarizabilities of ions under the effect of pressure.…”

Section: (10)mentioning

confidence: 99%

Dielectric Constants and Their Pressure and Temperature Derivatives for Ionic Crystals

Shanker¹,

Dixit²

1991

Phys. Stat. Sol. (a)

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Section: (10)mentioning

confidence: 99%

Dielectric Constants and Their Pressure and Temperature Derivatives for Ionic Crystals

Shanker¹,

Dixit²

1991

Phys. Stat. Sol. (a)

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“…We found that the addition of these terms as well as small changes in the parameters involved in the model (i.e. ionic polarizability [20] and repulsive parameters) do not affect significantly the final results, and in particular do not improve the agreement with the experimental data. We point out that not only is the polarization term very important, as already observed in [11], but it is really the only term relevant to our purposes.…”

Section: Other Ionic Alloys and Conclusionmentioning

confidence: 89%

Random pseudobinary ionic alloys: lattice energy and structural properties

Tinivella

Peressi

Baldereschi

1997

J. Phys.: Condens. Matter

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Experimental data suggest that in ionic solid solutions the bond-length mismatch is partially accommodated by microscopic lattice distortions. In this paper we study the structural properties of ionic alloys using a generalized Born - Mayer energy model accounting for the possibility of atomic-scale relaxations. Cubic supercells are used to simulate the real random alloys, providing statistical information about the atomic distribution and interatomic distances. The good agreement with the available experimental data and with the results of ab initio pseudopotential calculations performed for comparison for some selected systems indicate the validity of the model here employed. We also discuss the applicability to ionic alloys of the special quasi-random structures originally proposed for semiconducting alloys.

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