Abstract
The semiconducting II--IV--V2 phosphides, crystallizing in the chalcopyrite structure, are the closest isoelectronic and structural analogs of diamondlike phosphides from III--V group compounds [i]. Because of the reduction of the symmetry owing to the presence of two types of cations, the displacement of anions from the equilibrium (in the cubic lattice) positions, and the tetragonal compression of the lattice, the band structure of II--IV--V2 semiconductors is more complicated than that of III--V semiconductors. The selection rules for dipole-allowed transitions predict complex polarized optical spectra in the region of the fundamental absorption [2-8].
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