DIFFUSION OF ELECTRONS IN QUASI-1D POLYMER STRUCTURES WITH RANDOM INTERCHAIN COUPLINGS

We study electronic diffusion in quasi-one-dimensional systems with ra ndomly placed interchain single and double bond cross-links correspond ing to one and two adjacent interchain hoppings, respectively. While i n the single bond case all states are localized, for the double bond c ase many completely unscattered states are obtained forming a ''dilute '' conducting band which leads to superdiffusive wave packet dynamics. This new type of band structure can explain the unusual transport pro perties of highly conducting polymers.