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1998•Molecular crystals and liquid crystals science technology. Section A, Molecular crystals and liquid crystals/Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystalsRequires access

Landau Theory of Nematic-Smectic-A Transition in a Liquid Crystal Mixture

Prabir Kumar Mukherjee

Open publisher page 6 citations

Abstract

Binary mixtures of HBAB {p-[(p-hexyloxy-benzylidene)-amino] benzonitrile} and CBOOA [N-p-cyanibenzylidene-p-n-octyloxyaniline] exhibit a two phase region where both smectic-A and nematic phase coexists. The reason for this two phase region is discussed by means of Landau formalism. The problem of the first or second order nature of the nematic-smectic-A phase transition is explored. General Landau theory for coupled orientational, translational order parameters and concentration is developed.

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Binary mixtures of HBAB {p-[(p-hexyloxy-benzylidene)-amino] benzonitrile} and CBOOA [N-p-cyanibenzylidene-p-n-octyloxyaniline] exhibit a two phase region where both smectic-A and nematic phase coexists. The reason for this two phase region is discussed by means of Landau formalism. The problem of the first or second order nature of the nematic-smectic-A phase transition is explored. General Landau theory for coupled orientational, translational order parameters and concentration is developed.

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Available abstract

Binary mixtures of HBAB {p-[(p-hexyloxy-benzylidene)-amino] benzonitrile} and CBOOA [N-p-cyanibenzylidene-p-n-octyloxyaniline] exhibit a two phase region where both smectic-A and nematic phase coexists. The reason for this two phase region is discussed by means of Landau formalism. The problem of the first or second order nature of the nematic-smectic-A phase transition is explored. General Landau theory for coupled orientational, translational order parameters and concentration is developed.

Key concepts: Liquid crystal, Landau theory, Condensed matter physics, Phase transition, Formalism (music), Phase (matter), Materials science, Biaxial nematic

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