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A joint theoretical and experimental study of the effects of dilute doping on the optical absorption spectra of trans-polyacetylene, trans-(CH)ₓ, is presented. It is shown that the optical transition between a band state and the soliton level is considerably enhanced. However, the existence of a soliton kink strongly suppresses the interband transition. The agreement between theory and experiment supports the applicability of the soliton model to trans-(CH)ₓ.
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Suzuki et al. (1980) studied this question.
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