Soliton lattices in polyacetylene

Abstract

Making use of an exact soliton lattice solution for the continuum version of the Su, Schrieffer, and Heeger model of trans-polyacetylene, we have calculated the chemical potential of the soliton and the electronic density of states as functions of the soliton density ${n}_{s}$. All these confirm that in the weak-coupling limit, the regular soliton lattice is stable for all soliton densities as long as the continuum theory is valid.