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  1. 1 Acta Physica Polonica A

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  1. 1 1995

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  1. 1 Petelenz P.

  2. 1 Slawik M.

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Exciton Electro-Absorption at Non-Zero Wave Vector

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Slawik M., Petelenz P.
Acta Physica Polonica A
|
1995
|
vol. 88
|
issue 2
401-409
EN
Based on a previously proposed two-dimensional model of a polyacene crystal, the contributions to the electro-absorption signal from different points of the exciton Brillouin zone are calculated. They are shown to differ substantially both in amplitude and in shape. This makes electro-absorption spectra very sensitive to vibronic coupling. On the one hand, the new factor is a potential complication in theoretical interpretations. On the other hand, it favours electro-absorption spectroscopy as a promising experimental tool to study vibronic effects.
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