The low-lying particlelike excitations of a model linearly conjugated diatomic polymer, (A=B)ₓ, are found to be pairs of either spin-0 or spin-{} solitons with irrational charge values. The charge values and excitation energies are calculated as functions of the difference of the energy levels of the atomic p orbitals of the two atomic constitutents of the unit cell. The phonon spectrum of the uniform polymer is also calculated.
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Rice et al. (1982) studied this question.