Abstract
The off-state direct current I–V characteristics for glassy alloys As 40Se 30Te 30 and As 20Se 50Te 30 at different temperatures were studied. For this study of electrical conduction properties, two kinds of electrode configurations were used: a double-point contact on one surface and a sandwich device. It was found that current flow can be space-charge limited, producing non-ohmic behaviour, which in turn reflects on the electrical switching effect that the materials exhibit. The influence of the selenium content on the electrical properties was also studied. The experimental results obtained were compared with those in the literature, and the differences justified by the method of material preparation. Lastly, the dependence of ohmic resistance on temperature was analyzed, and the characteristic behaviour of intrinsic semiconduction observed.
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