Optical properties of cubic K3Sb

A number of optical characteristics of the crystal K₃Sb of cubic structure (the complex dielectric permeability function, the density of electron states, the refractive and absorptive indices, the optical density of the material) are computed on the basis of the electron energy spectrum calculated by the pseudopotential method taking account of nonlocality and spin-orbital interaction. Direct and indirect transition models to describe the optical excitation of electrons are discussed. Theoretical and experimental curves are compared.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 2, pp. 33–39, February, 1979.