Electrical conductivity of heavily doped polyacetylene at ultralow temperatures

The electrical conductivity of heavily doped polyacetylene, (CH)ₓ, has been measured from room temperature down to 0.4 mK and in magnetic fields from 0 to 290 Oe. Below 30 mK the resistance increases logarithmically with decreasing temperature, and decreases roughly logarithmically with increasing magnetic field. The results are compared to recent localization and interaction models of electron transport in systems of reduced dimensionality.