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Urbach rule and disordering processes in Cu6P(S1−xSex)5Br1−yIy superionic conductors |
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| Authors: | M Kranj?ec IP Studenyak |
| Institution: | a Department of Geotechnical Engineering, University of Zagreb, 7 Hallerova Aleja, 42000 Vara?din, Croatia b Ru?er Boškovi? Institute, Zagreb, 54 Bijeni?ka Cesta, P.O. Box 180, 10002 Zagreb, Croatia c Uzhhorod National University, 46 Pidhirna Street, Uzhhorod, 88000, Ukraine d Institute of Physics, Ukrainian National Academy of Sciences, 46 Prospect Nauki, 03680 Kyiv, Ukraine |
| Abstract: | Compositional behavior of Urbach absorption edge is studied as well as the effect of compositional disordering on the parameters of exciton-phonon interaction, phase transition temperatures and electric conductivity in Cu6P(S1−xSex)5Br1−yIy superionic solid solutions. The effect of different types of disordering on the optical absorption processes and specific features of compositional changes in the absorption edge spectra under S→Se and Br→I anion substitution in the mixed crystals are investigated. (x, T) phase diagrams for Cu6P(S1−xSex)5X (X=I, Br) solid solutions are studied. |
| Keywords: | A Superionic conductor D Urbach rule D Phase transition D Exciton-phonon interaction D Compositional disordering |
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