Percolation and Localization in Disordered Solid Solutions

摘要: We present an approach to quantitative description of the states split off from electronic bands due disorder which exists in crystalline solid solutions. The concentration solution component creating localizing potential is supposed be below critical one for percolation over lattice sites. In this range clusters composed by atoms minor component, produce localized carriers and/or excitons, are isolated space. calculation number cluster well known problems theory crystal describe how results can used density states, which, turn, modelling spectral (or absorption coefficient) exciton states. Then, continuum classical overlapping spheres luminescence spectrum excitons. models quite steady-state optical spectra diluted GaS1-cIncN and also that ZnSe1-cTec CdS1-cSec solutions all composition range. These account nontrivial peculiarities intensity decay at long delay times after pulse excitation.