Abstract
Recent three-dimensional band structure calculations on trans-polyacetylene and poly(phenylene vinylene) have corroborated the suggestion that interchain coupling is too strong in these materials for polarons to exist. Nevertheless there is evidence that polarons do exist in these materials. We show that conjugation breaks, by decreasing the effective interchain coupling, allow the existence of polarons. The effect of such breaks on optical absorption and hopping transport of polarons is discussed.
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