Dergiler / Turkish Journal of Physics / 2003 / Cilt: 27 - Sayı: 6
Studies on the Opto-Electronic Constants of Alkali-Halide Crystals
- Sayfa
- 569–577
- DOI
- —
Özet
In this presentation, the correlation between refractive index n of alkali-halide crystals and both energy band gap Eg and Pauling's electronegativity difference D x have been studied. The following relations are proposed for estimating the refractive index n: n2 + C = A / Eg 1 / 2 and n2 + C = E / (D x)0.425, where A, C and E are numerical constants. In addition, an interrelation between the energy band gap Eg and electronegativity difference D x has been also proposed. The proposed relation is Eg = 4.45 (D 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.
Abstract
In this presentation, the correlation between refractive index n of alkali-halide crystals and both energy band gap Eg and Pauling's electronegativity difference D x have been studied. The following relations are proposed for estimating the refractive index n: n2 + C = A / Eg 1 / 2 and n2 + C = E / (D x)0.425, where A, C and E are numerical constants. In addition, an interrelation between the energy band gap Eg and electronegativity difference D x has been also proposed. The proposed relation is Eg = 4.45 (D 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.