Experimental study of the structure of chalcogenide glassy semiconductors in three-component systems of Ge-As-Se and As-Sb-Se by means of NQR and EPR spectroscopy

The structure of chalcogenide glassy semiconductors in three-component systems of Ge-As-Se and As-Sb-Se has been studied by means of both NQR and EPR spectroscopy. Investigation of mutual local coordination of atoms has been performed. The results are presented for various ways of combining structural units to provide medium and long-range chemical order of chalcogenide glasses. It appears that for the Ge-As-Se system the structural transition from a two-dimensional to three-dimensional structure occurs at r = 2.45.