# Observation of a threshold behavior in the optical band gap and thermal diffusivity of Ge-Sb-Se glasses

Srinivasan, A and Madhusoodanan, KN and Gopal, ESR and Philip, J (1992) Observation of a threshold behavior in the optical band gap and thermal diffusivity of Ge-Sb-Se glasses. In: Physical Review B, 45 (14). pp. 8112-8115.

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## Abstract

The optical band gap $(E_0)$ and thermal diffusivity (α) of bulk $Ge_xSb_5Se_{95-x}$ and $Ge_xSb_{10}Se_{90-x}$ glasses have been measured using the photoacoustic technique. The behavior of $E_0$ and α as the mean coordination number $\langle r \rangle$ is varied shows a maximum at $\langle r \rangle=2.6$. The anomalous behavior at $\langle r \rangle=2.6$ is explained on the basis of changes in the network topology due to the formation and development of layered structure in these glasses.

Item Type: Journal Article Copyright of this article belongs to American Physical Society. Division of Physical & Mathematical Sciences > Physics 30 Oct 2006 19 Sep 2010 04:31 http://eprints.iisc.ernet.in/id/eprint/8281