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

Asokan, S. ; Parthasarathy, G. ; Gopal, E. S. R. (1987) Evidence for a critical composition in group-IV-VI chalcogenide glasses Physical Review B: Condensed Matter and Materials Physics, 35 (15). pp. 8269-8272. ISSN 1098-0121

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Official URL: http://prb.aps.org/abstract/PRB/v35/i15/p8269_1

Related URL: http://dx.doi.org/10.1103/PhysRevB.35.8269


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 SixTe100-x glasses (10≤ x≤ 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:Article
Source:Copyright of this article belongs to The American Physical Society.
ID Code:71090
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