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Chemical and shifted mechanical thresholds in Al-Ge-Te glass system

Narayanan, RA and Kumar, A and Asokan, S (1998) Chemical and shifted mechanical thresholds in Al-Ge-Te glass system. [Book Chapter]

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We report the results of the electrical switching studies performed on the bulk Al20GexTe80-x (2.5 less than or equal to x less than or equal to 15) chalcogenide glasses. The well known topological features, mechanical and chemical thresholds are observed. Mechanical threshold is seen at a mean coordination number of atoms, < r > = 2.50 (x = 5) a clear shift rom the mean field value of < r > = 2.4 whereas the chemical threshold is observed at < r > = 2.65 (x = 12.5) as predicted by the chemically ordered covalent network model These experiments are a sequel to similar experiments on Al20AsxTe80-x glasses in which mechanical threshold was seen at < r > = 2.60 and no chemical threshold was observed These results am well understood by a chemical bond picture developed in this article.

Item Type: Book Chapter
Series.: Solid State Physics: Proceedings of the D. A. E. Solid State Physics Symposium
Publisher: Universities Press india Ltd
Additional Information: Copyright of this article belongs to Universities Press india Ltd.
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 12 Apr 2012 08:01
Last Modified: 12 Apr 2012 08:01
URI: http://eprints.iisc.ac.in/id/eprint/43891

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