High electric field effect on the conductivity of iodine-doped polacetylene

Abstract The conductivities of iodine-doped new polyacetylenes with room-temperature values of 7.7 × 10 3 S/cm and 2.6 × 10 4 S/cm were measured as a function of applied electric field in the temperature range of 77 K to 4.2 K. It is shown that the behavior deviated obviously from the Sheng model which has been widely adopted in explaining temperature dependence for conventional polyacetylene with lower conductivity.