A theory of the dielectric loss in the aligned nematic mesophase - Ferrario, M.; Evans, M. (Elsevier)
A theory of dielectric absorption and dispersion in the nematic phase is developed which does not rely on the use of a nematic ''director''. The major features of the spectrum are reproduced by using the fact that the autocorrelation functions 〈μ(0) . υ(t)〉 and 〈υ(t) . μ(0)〉 are no longer symmetry disallowed when the overall sample is anisotropic, as in the aligned nematic. Here μ is the dipole vector of the diffusing molecule and υ the centre of mass linear velocity.
http://linkinghub.elsevier.com/retrieve/pii/0378-4371(81)90168-0
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