Evidence for a critical composition in Group IV-VI chalcogenide glasses

Asokan, S and Parthasarathy, G and Gopal, ESR (1987) Evidence for a critical composition in Group IV-VI chalcogenide glasses. In: Physical Review B: Condensed Matter and Materials Physics, 35 (15). pp. 8269-8272.

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Abstract

Experimental evidence for an ideal-glass composition in IV-VI chacogenide systems is obtained from high-pressure–low-temperature studies of Si-Te glasses. The electrical resistivity of bulk, melt-quenched {Si_xTe_{100-x}} glasses {(10\leq x \leq 28)} has been measured up to a pressure of 8 GPa and down to 77 K. All the glasses undergo sharp, discontinuous glassy-semiconductor–crystalline-metal transitions. The properties such as the transition pressure, the room-temperature atmospheric-pressure resistivity, and the activation energy for electrical conduction at different pressures show unusual variations at a composition x=20. The anomalous variations in properties observed at x=20 may be connected with the ideality of the glass occurring at this composition.

Item Type:	Journal Article
Publication:	Physical Review B: Condensed Matter and Materials Physics
Publisher:	The American Physical Society
Additional Information:	Copyright for this article belongs to the American Physical Society
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	16 May 2008
Last Modified:	19 Sep 2010 04:45
URI:	http://eprints.iisc.ac.in/id/eprint/14003

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