With use of a Peierls continuum description of a linearly conjugated diatomic polymer, (AB)ₓ, with nondegenerate ground states, it is found that the polymer possesses polaron, bipolaron, and multipolaron excitations. Unlike the nondegenerate (A)ₓ system, each one of these excitations is stable only within a range of the confinement parameter {γ}. In addition, an exact solution for a diamagnetic bipolaron lattice is found at higher dopant concentrations.
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Saxena et al. (1988) studied this question.