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APPLICABILITY OF CBH MODEL IN THE A.C. CONDUCTION STUDY OF GLASSY Se100-xInx ALLOYS

N. Mehta1, D. Kumar2, S. Kumar3, A. Kumar4,*

Affiliation

  1. Department of Physics, Pranveer Singh Institute of Technology, Kanpur, India
  2. Department of Physics, JSS Academy of Technical Education, Noida, India
  3. Department of Physics, Christ Church College, Kanpur – 208 001, India
  4. Department of Physics, Harcourt Butler Technological Institute, Kanpur-208 002, India

Abstract

Temperature and frequency dependence of a. c. conductivity were studied in glassy Se100-xInx for x = 10, 15 and 20. An agreement between experimental and theoretical results suggests that the a. c. conductivity behaviour of selenium-indium system can be successfully explained by correlated barrier hopping (CBH) model. The results show that bipolaron hopping dominates over single-polaron hopping in this glassy system. This is explained in terms of lower values of the maximum barrier height for single-polaron hopping. The values of the density of charged defect states N were also calculated..

Keywords

Chalcogenide glasses, Hopping conduction, Density of defect states.

Submitted at: Nov. 5, 2005
Accepted at: Nov. 24, 2005

Citation

N. Mehta, D. Kumar, S. Kumar, A. Kumar, APPLICABILITY OF CBH MODEL IN THE A.C. CONDUCTION STUDY OF GLASSY Se100-xInx ALLOYS, Journal of Optoelectronics and Advanced Materials Vol. 7, Iss. 6, pp. 2971-2977 (2005)