A CONDUCTION MECHANISM IN THE NONMAGNETIC REGIME OF DOPED POLYACETYLENE

We develop a model for the intrachain conduction mechanism in the non- magnetic regime of doped polyacetylene. We assign as current carriers superdefects, interstitial solitons and soliton holes, in a pinned cha rged soliton lattice. The internal strain energy and the Coulomb inter actions in the system are taken into account by a phase Hamiltonian. V ariational calculations show that the model gives a rather large activ ation energy in the conductivity beyond a doping concentration that is due to the internal strain energy and inconsistent with experiments.