Dielectric relaxation in polar nematic liquid crystals |
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Authors: | Yurii P. Kalmykov |
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Affiliation: | a Institute of Radioengineering and Electronics of the U.S.S.R. Academy of Sciences, Moscow, U.S.S.R |
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Abstract: | The relationship between the complex dielectric permittivity tensor of a polar nematic liquid crystal and the autocorrelation matrix for the permanent dipole moment of a molecule is obtained. The theory is applicable to the whole frequency range which characterizes orientational relaxation in liquid crystals (up to ∼ 5 THz). The models of rotational diffusion and extended rotational diffusion in a mean field nematic potential are used to evaluate the dielectric absorption and dispersion in nematics. |
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