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Title: Pseudo-polar order in the tilted smectic phases of bent-core hockey stick shaped molecules
Authors: Malkar, Deepshika
Roy, Arun
Keywords: liquid crystals
bent core liquid crystals
phase transitions
dielectric constant
Issue Date: 25-May-2022
Publisher: Taylor and Francis
Citation: Liquid Crystals, 2022, Vol.49, p1147
Abstract: We discuss the liquid crystal phases of a compound consisting of bent-core hockey-stick-shaped molecules. The compound exhibits two smectic phases with an in-plane pseudo-polar order in addition to the tilt order in the layers. The transverse shape anisotropy and dissimilar arm lengths of these bent-core molecules stabilise these pseudo-polar tilted smectic phases. The higher temperature smectic phase has an anti-clinic organisation of the molecules in successive layers. An intermediate organisation between the synclinic and anti-clinic structures is found in the lower temperature smectic phase. We have developed a simple phenomenological model to account for these phases. In the higher temperature smectic phase, a field-induced Freedericksz type transition is observed beyond a threshold electric field. We also account for this field-induced transition using our theoretical model.
Description: Restricted Access.
ISSN: 0267-8292
1366-5855 (Online)
Alternative Location:
Copyright: 2022 Informa UK Limited, trading as Taylor & Francis Group
Appears in Collections:Research Papers (SCM)

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