Abstract
In disordered systems, the dependence of the DC conductivity on the electric field E increases when the temperature is lowered. We studied the non-ohmic conductivity σ(E) of a series of carbon-black/polymer composites as a function of temperature T and concentration p. The low-temperature results indicate that the strength of E affects the path along which conduction proceeds through the materials. The new characteristic length scale is a few times larger than found in the zero electric-field limit.
Original language | English |
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Pages (from-to) | 871-872 |
Journal | Synthetic Metals |
Volume | 84 |
Issue number | 1-3 |
DOIs | |
Publication status | Published - 1997 |
Externally published | Yes |