Hubbard effect on soliton motion of polyacetylene

By starting with the antiferromagnetic chain model, it has been set up that the coupled nonlinear equations describe the interaction between the latti ce displacement and the electronic wave function. We obtain an analytic sol ution of the equation of motion and study the nonlinear dynamics of polyace tylene by considering the Hubbard interaction. The influence of the Hubbard potential upon the parameters of the soliton such as the effective mass an d hall-width of the lattice kink has been revaluated. With increasing Hubba rd potential, the dimerization and half-width will increase bur the effecti ve mass will decrease.