Topological consideration of thallium on glassy arsenous selenide

摘要: Abstract Understanding of the effect addition Tl on glassy As2Se3 prepared under vacuum, has greatly improved with advent several structural and chemical models, which predict influence such an addition, in terms average heat atomization Hs coordination number Nco. The latter are computed from elements, respectively. A correlation had been found between chalcogenide system (As2Se3)1−xTlx lone-pair electrons. stable vitreous state can be obtained only if enough electrons exist structure system. cation glasses may interact electrons, bridging chalcogen atoms glass forming ability. Investigation dependence differential thermal analysis (DTA) and, optical gap Eg “previously published” composition vacuum revealed that Nco, a great these properties. nature Nco dependencies is discussed relation to topological percolative consideration.