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Information × Registration Number 0119U103389, ( 0220U100067  ) R & D request Title New materials for active media of is solid state lasers Head Denysyuk Natalіya M., Кандидат фізико-математичних наук Registration Date 21-10-2019 Organization Institute for Problems in Materials Science popup.description1 The purpose of this work is to study the electronic structure and optical properties of lead-based halides of the general formula APb2X5 (A = K, Rb; X = Br, Cl), as well as to change the energy distribution of electronic states within a valence band at isomorphic substitutions of the atoms of one sort of atoms of is another variety. Аlsoб the purpose of the work includes the study of possible changes in the charge state of atoms and the energy distribution of electronic states in the valence band according to the RFS spectra in the sequence of compounds KPb2Cl5, RbPb2Cl5, KPb2Cl5, RbPb2Cl5, K0,5Rb0,5Pb2Cl5. Determing the energy distribution of the total and partial densities of the electronic states in the valence band and the conduction band of the APb2X5 compounds on the basis of theoretical "in first principles" calculations. In addition, basic optical characteristics, such as absorption coefficient, dielectric functions and refractive index, extinction coefficient, optical reflectance, energy loss spectrum, will be investigated for APb2X5 compounds on the basis of theoretical "in first principles" calculations. popup.nrat_date 2024-12-10 Close