| Issue |
Europhys. Lett.
Volume 39, Number 3, July I 1997
|
|
|---|---|---|
| Page(s) | 335 - 340 | |
| Section | Condensed matter: electronic structure, electrical, magnetic and optical properties | |
| DOI | https://doi.org/10.1209/epl/i1997-00357-4 | |
| Published online | 01 September 2002 | |
An ANNNXY model for transversely polarised non-chiral smectic liquid crystals
Raman Research Institute - C.V. Raman Avenue, Bangalore 560080, India
Received:
10
March
1997
Accepted:
22
June
1997
We propose an axial next nearest neighbour xy (ANNNXY) model to describe phase transitions
in smectic liquid crystals made of bent non-chiral molecules which exhibit transverse
polarisation. The model includes a polar and a quadrupolar NN coupling as well as a
competing antiferroelectric NNN coupling between the layers. As the temperature is lowered,
the most general sequence of phases predicted by the model is: paraelectric-helielectric
(H
)-antiferroelectric-reentrant H-4 layer antiphase-helielectric
(Hf)-ferroelectric. We believe that Hf and the antiphase have been seen in
very recent experiments.
PACS: 77.80.-e – Ferroelectricity and antiferroelectricity / 77.80.Bh – Phase transitions and Curie point / 77.84.Nh – Liquids, emulsions and suspensions; liquid crystals
© EDP Sciences, 1997
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