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Anisotropy of the local field in anisotropic films of conjugated polymers

  • Polymers
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Abstract

Using the data on dispersion of refractive indices in the visible region, the experimental values of the components L j of the Lorentz tensor have been obtained for uniaxial (crystalline, oriented on a substrate, and stretched) films of conjugated polymers from nanometer to micrometer thicknesses. The dependence of the components L j on the axial and planar orientations of macromolecules with respect to the optical axis of the film, technology of fabricating the films, and chemical structure of macromolecules has been elucidated. The correlation between the components L j and the measured parameter η has been determined and the analytical dependence L j (η) for films with both types of macromolecular orientation has been established. In the visible region (0 ≤ η ≤ 0.5), the presence of one point (η = 1/3) of isotropization of the tensor L and three points (η = 0, 1/3, and 0.5) of isotropization of the local field tensor f has been revealed. The point η = 1/3 of isotropization of the tensors L and f has been determined. A comparison has been made between the values of L j (η) with predictions of known models of the local field for conjugated polymers.

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  1. Kirensky Institute of Physics, Siberian Branch of the Russian Academy of Sciences, Akademgorodok 50-38, Krasnoyarsk, 660036, Russia

    E. M. Aver’yanov

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Correspondence to E. M. Aver’yanov.

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Original Russian Text © E.M. Aver’yanov, 2011, published in Fizika Tverdogo Tela, 2011, Vol. 53, No. 9, pp. 1832—1840.

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Aver’yanov, E.M. Anisotropy of the local field in anisotropic films of conjugated polymers. Phys. Solid State 53, 1933–1942 (2011). https://doi.org/10.1134/S1063783411090046

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