Elastic constants of nematic liquid crystals of uniaxial symmetry

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dc.creatorSrivastava, Amit
dc.creatorSingh, Shri
dc.date2004-05-24
dc.date.accessioned2026-07-07T02:58:19Z
dc.date.available2026-07-07T02:58:19Z
dc.descriptionWe study in detail the influence of molecular interactions on the Frank elastic constants of uniaxial nematic liquid crystals composed of molecules of cylindrical symmetry. A brief summary of the status of theoretical development for the elastic constants of nematics is presented. Considering a pair potential having both repulsive and attractive parts numerical calculations are reported for three systems MBBA, PAA and 8OCB. For these systems the length-to-width ratio ${x_0}$ is estimated from the experimentally proposed structure of the molecules. The repulsive interaction is represented by a repulsion between hard ellipsoids of revolution (HER) and the attractive potential is represented by the quadrupole and dispersion interactions. From the numerical results we observe that in the density range of nematics the contribution of the quadrupole and dispersion interactions are small as compared to the repulsive HER interaction. The inclusion of attractive interaction reduces the values of elastic constants ratios. The temperature variation of elastic constants ratios are reported and compared with the experimental values. A reasonably good agreement between theory and experiment is observed.
dc.identifierhttps://arxiv.org/abs/cond-mat/0405553
dc.identifierhttp://arxiv.org/abs/cond-mat/0405553
dc.identifierJ. Phys. Condens. Matter Vol. 16 (2004) 7169-7182
dc.identifierdoi:10.1088/0953-8984/16/41/001
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/24035
dc.subjectSoft Condensed Matter
dc.subjectStatistical Mechanics
dc.titleElastic constants of nematic liquid crystals of uniaxial symmetry
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