NANOSYSTEMS: PHYSICS, CHEMISTRY, MATHEMATICS, 2016, 7 (1), P. 169–174
Power-like corrections to the conductivity of Mo–C nanocomposites
A. D. Bozhko – A. M. Prokhorov General Physics Institute, Russian Academy of Sciences, Moscow, Russia; bozhko@lt.gpi.ru
The evolution of the electron transport character in thin films of Mo–C nanocomposites is studied over the metal concentration range 0.14 – 0.3 at temperatures from 4.2 to 400 K. It is shown that conductivity of the Mo–C nanocomposites demonstrates the distinct power-like behavior in the two temperature intervals separated at 20 – 25 K. The concentration dependences of the power exponent in both temperature intervals are characterized by the expressed minimum at Mo content close to 0.2 varying over the range 0.25 – 1.0. The experimental data are discussed and simulated in the model of inelastic tunneling of the electrons in amorphous dielectrics in the framework of the effective medium approximation.
Keywords: metal-carbon nanocomposite, granular materials, amorphous carbon, electron transport, inelastic tunneling.
PACS 72.80.Tm, 72.80.Ng
DOI 10.17586/2220-8054-2016-7-1-169-174
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