Interchain Pair Hopping of Solitons and Polarons via Dopants in Polyacetylene

摘要

Interchain hopping of solitons and polarons in polyacetylene is studied bynumerical simulation of their motion under an electric field. Use is made ofthe Su-Schrieffer-Heeger model supplemented with intrachain electron-electroninteractions and dopant potentials. We find that charged solitons can hop tothe opposite chain by forming bound pairs (bipolarons). For the case ofpolarons also, hopping in a pair is more favorable than single polaron hopping.Interchain hopping of a polaron pair is more efficient than that of a solitonpair.