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

摘要

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