Abstract
The conductivity of carbon films grown by polymethylphenylsiloxane vapor decomposition in stimulated dc discharge plasma was studied. It is found that the Mott hopping conductivity \( \sigma \left( T \right) = \sigma _0 \left( T \right)\exp \left\{ { - \frac{{T_0 }} {T}^{{1 \mathord{\left/ {\vphantom {1 4}} \right. \kern-\nulldelimiterspace} 4}} } \right\} \) is characteristic of the samples under study in the temperature range of 80–400 K in the electric field E to 5 · 104 V/cm. An analysis of the pre-exponential factor σ 0(T) = σ 00(T 0)T α allowed the conclusion that the hopping transport is most adequately described in the model with the exponential energy dependence of the density of localized states for which α = −1/2 and the universal relation ln σ 00 −T 1/40 0 is valid, which is satisfied in the range where the parameter σ 00 varies by eight orders of magnitude.
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Original Russian Text © E.A. Kataeva, A.D. Bozhko, S.V. Demishev, 2010, published in Kratkie Soobshcheniya po Fizike, 2010, Vol. 37, No. 11, pp. 29–36.
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Kataeva, E.A., Bozhko, A.D. & Demishev, S.V. Pre-exponential factor of the hopping conductivity in disordered carbon films. Bull. Lebedev Phys. Inst. 37, 347–351 (2010). https://doi.org/10.3103/S1068335610110059
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DOI: https://doi.org/10.3103/S1068335610110059