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Chalcogenides; hopping conduction; defect states

In general, the conductivity in chalcogenide glasses at higher temperatures is dominated by band conduction (DC conduction). But, at lower temperatures, hopping conduction dominates over band conduction. A study at lower temperature can, eventually, provide useful information about the conduction mechanism and the defect states in the material. Therefore, the study of electrical properties of Ge_xSe_100-x in the lower temperature region (room temperature) is interesting. Temperature and frequency dependence of Ge_xSe_{100-x (x} = 15, 20 and 25) have been studied over different range of temperatures and frequencies. An agreement between experimental and theoretical results suggested that the behaviour of germanium selenium system (Ge_xSe_100-x) have been successfully explained by correlated barrier hopping (CBH) model.

Abdolali Zolanvari¹ Navdeep Goyal² S K Tripathi²

1. Department of Physics, Arak University, Arak - 38156, Iran
2. Department of Physics, Panjab University, Chandigarh - 160 014, India

Published

September 2004

Manuscript received

6 February 2003

Manuscript revised

29 December 2003

Accepted

1 April 2004