Simple Landau model of the smectic- A-isotropic phase transition |
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| Authors: | P.K. Mukherjee H. Pleiner H.R. Brand |
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| Affiliation: | Theoretische Physik III, Universit?t Bayreuth, D-95540 Bayreuth, Germany, DE
Max-Planck-Institut für Polymerforschung, 55021 Mainz, Germany, DE
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| Abstract: | A simple Landau-type free energy function is presented to describe the smectic-A-isotropic phase transition. Varying the coupling between orientational and positional order parameters, a smectic-A-isotropic or a nematic-isotropic phase transition occurs. Within this model the smectic-A-isotropic phase transition is found to be always more strongly first order than the nematic-isotropic phase transition. The theoretical results are found to be in good agreement with all published experimental results. Received 27 June 2000 |
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| Keywords: | PACS. 64.70.Md Transitions in liquid crystals – 05.70.Fh Phase transitions: general studies – 61.30.-v Liquid crystals |
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