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Theoretical calculation of physical parameters of Ge10Se90-xTex glassy alloys

P. SHARMA1,* , S. C. KATYAL1

Affiliation

  1. Department of Physics, Jaypee University of Information Technology, Waknaghat, Solan, HP – 173215, India

Abstract

In the present paper we have theoretically calculated the number of constraints, effective coordination number, optical band gap ( opt g th E , ), oscillator strength and dispersion energy based on Wemple-DiDomenico model, average heat of atomization and average single bond energy for a-Ge10Se90-xTex where x = 0, 10, 20, 30, 40, 50. The theoretically calculated and experimentally observed optical band gap for a-Ge10Se90-xTex thin films prepared by vacuum evaporation technique at base pressure ~10-5 Torr were found to be in good agreement. The results are explained on the basis of density of states model proposed by Mott and Devis..

Keywords

Thin films, Optical properties, Chalcogenide glasses, Ge-Se-Te.

Submitted at: Jan. 5, 2007
Accepted at: July 15, 2007

Citation

P. SHARMA, S. C. KATYAL, Theoretical calculation of physical parameters of Ge10Se90-xTex glassy alloys, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 7, pp. 1994-1999 (2007)