ТЕМПЕРАТУРНАЯ ЗАВИСИМОСТЬ ШИРИНЫ ЗАПРЕЩЕННОЙ ЗОНЫ МОНОКРИСТАЛЛОВ Mn 1.5 AgIn 8.0 S 14

Mn 1.5 AgIn 8.0 S 14 single crystals were grown by the Bridgman directed melt crystallization method. Crystals composition and structure were determined. It was found that these single crystals crystallize in a cubic spinel structure with a lattice constant a = 10.765 ± 0.005 A. The width of the band gap of Mn 1.5 AgIn 8.0 S 14 single crystals was estimated from the transmission spectra in the region of the edge of its intrinsic absorption in the temperature range of 10—320 K. The band gap width decreases with the temperature increasing and a functional approximation of this dependence was obtained.