Turkish Journal of Physics
DOI
-
Abstract
In this presentation, the correlation between refractive index n of alkali-halide crystals and both energy band gap E_{g} and Pauling's electronegativity difference \Delta x have been studied. The following relations are proposed for estimating the refractive index n: n^2 + C = A / E_{g} ^{1 / 2} and n^2 + C = E / (\Delta x)^{0.425}, where A, C and E are numerical constants. In addition, an interrelation between the energy band gap E_{g} and electronegativity difference \Delta x has been also proposed. The proposed relation is E_g = 4.45 (\Delta x)^{0.85}. The estimated values of the refractive index are utilized to evaluate the electronic polarizability of alkali-halides by applying the Lorentz-Lorenz formula. The computed values of refractive index, energy gap and electronic polarizability are compared with those in literature.
First Page
569
Last Page
578
Recommended Citation
SALEM, MAHMOUD A. (2003) "Studies on the Opto-Electronic Constants of Alkali-Halide Crystals," Turkish Journal of Physics: Vol. 27: No. 6, Article 7. Available at: https://journals.tubitak.gov.tr/physics/vol27/iss6/7
