Electrical conductivity of the semiconducting phase in vanadium dioxide single crystals |
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Authors: | V. N. Andreev V. A. Klimov |
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Affiliation: | (1) Ioffe Physicotechnical Institute, Russian Academy of Sciences, Politekhnicheskaya ul. 26, St. Petersburg, 194021, Russia |
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Abstract: | The electrical conductivity of the semiconducting phase of vanadium dioxide single crystals is studied over a wide range of temperatures. It is shown that the electrical conductivity varies with temperature as log σ ~ T in the range 340–170 K and as log σ ~ 1/T at temperatures below 120 K. The experimental results are described in the framework of the model in which the temperature dependence of the hopping conductivity of small-radius polarons is determined by the dependence of the resonance integral on the amplitude of thermal lattice vibrations. |
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