Hopping conduction in zinc vanadate semiconducting glasses

Ghosh, Aloka ; Bhattacharya, S. ; Bhattacharya, D. P. ; Ghosh, A. (2008) Hopping conduction in zinc vanadate semiconducting glasses Journal of Applied Physics, 103 (8). 083703_1-083703_5. ISSN 0021-8979

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Official URL: http://jap.aip.org/resource/1/japiau/v103/i8/p0837...

Related URL: http://dx.doi.org/10.1063/1.2904933


In this paper, we have studied the electrical conductivity for different compositions of the zinc vanadate semiconducting glasses within a wide temperature range. We have analyzed the temperature dependence of the electrical conductivity within the framework of various models for the hopping conduction. We have observed that Mott's phonon-assisted nearest neighbor hopping model of small polarons is appropriate for describing the conductivity data at high temperatures. We have further observed that at lower temperatures, Mott's variable range hopping model is operative, while Greaves' variable range hopping model is valid within the intermediate temperature range. The values of the density of states at the Fermi level, which are obtained from the analysis, are consistent with those for localized states.

Item Type:Article
Source:Copyright of this article belongs to American Institute of Physics.
Keywords:Electronic Density of States; Fermi Level; Glass; Hopping Conduction; Localised States; Polarons; Semiconductor Materials; Vanadium Compounds; Zinc Compounds
ID Code:72819
Deposited On:29 Nov 2011 13:27
Last Modified:29 Nov 2011 13:27

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