Fluctuation-Induced Tunneling Conduction in Carbon-Polyvinylchloride Composites

作者：Ping Sheng, Enid K. Sichel, Jonathan I. Gittleman · 发表于：Physical Review Letters · 年份：1978 · DOI：10.1103/physrevlett.40.1197 · 被引用次数：630 · 研究领域：High voltage insulation and dielectric phenomena、Carbon Nanotubes in Composites、Lightning and Electromagnetic Phenomena

We present evidence that in carbon-polyvinylchloride composites, consisting of aggregates of carbon spheres (100-400 \AA{}) dispersed in the insulating matrix, the electrical conductivity can be ascribed to a novel mechanism of tunneling with potential-barrier modulation by thermal fluctuations. Theoretical consideration of the tunneling-probability modification by thermal fluctuating electric field across tunnel junctions yields expressions for the temperature and the field dependences of the conductivity in excellent accord with experimental results.