SYNTHESIS AND OPTICAL PROPERTIES OF ZnAs_2 AND CdAs_2 CRYSTALS AND FILMS

摘要

The studies devoted to the synthesis and optical properties of CdAs_2 and ZnAs_2 crystals and films are surveyed. Vertical Bridgman growth provides the most perfect CdAs_2 and ZnAs_2 crystals, suitable for precision spectral measurements of optical absorption, photoconductivity, and luminescence. The experimental data obtained on these crystals made it possible to develop models for the band-structure of CdAs_2 and ZnAs_2 in the minimum-gap region and for the formation of donor levels in CdAs_2.