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

摘要

Temperature and frequency dependence of a. c. conductivity have been studied in glassy Se100-xInxfor 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 are also calculated