Analytical solutions for rotational diffusion in the mean field potential: application to the theory of dielectric relaxation in nematic liquid crystals
作者:
YURI P. KALMYKOV,
WILLIAM T. COFFEY,
期刊:
Liquid Crystals
(Taylor Available online 1998)
卷期:
Volume 25,
issue 3
页码: 329-339
ISSN:0267-8292
年代: 1998
DOI:10.1080/026782998206128
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
A theory of dielectric relaxation in nematics is developed for a molecular dipole moment directed at an arbitrary angle to the molecular long axis. Both exact and simple approximate analytical formulae for the longitudinal and transverse components of the complex dielectric permittivity tensor are obtained for the non-inertial rotational Brownian motion of a molecule in the mean field potential of Maier and Saupe. It appears that both longitudinal and transverse relaxation processes are effectively described by two Debye type mechanisms with corresponding relaxation times and dielectric strengths expressed in terms of the order parameter. The generalization of the theory for an arbitrary axially symmetric mean field potential is given.
点击下载:
PDF (281KB)
返 回