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Abstract
A molecular field theory of the smectic-A−smectic-C transition has been developed for smectics with a diffused cone orientational distribution of molecules (volcano-like distribution function) in the smectic-A phase and anomalously weak layer contraction in the smectic-C phase. Orientational order parameters and smectic layer spacing have been calculated numerically as functions of temperature and compared with the results obtained using a model with a standard Maier-Saupe–type distribution function that has been considered before. A molecular theory of the electroclinic effect in chiral smectics has also been developed using the recently proposed simple biaxial interaction potential. A comparison has been made between the absolute values and temperature variations of the electroclinic coefficient obtained using the volcano model, the model with Maier-Saupe–type distribution, and the orthodox cone model proposed by de Vries. It has been shown that the model with a conventional “sugar loaf” type orientational distribution function in the smectic-A phase is sufficient to describe the main properties of smectics with anomalously weak layer contraction.
Original language | English |
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Article number | 021701 |
Journal | Physical Review E: Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics |
Volume | 85 |
Issue number | 121701 |
DOIs | |
Publication status | Published - 13 Feb 2012 |
Keywords
- tilting transition
- smectic liquid crystals
- weak layer contraction
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Dive into the research topics of 'Molecular theory of the tilting transition in smectic liquid crystals with weak layer contraction and diffused cone orientational distribution'. Together they form a unique fingerprint.Projects
- 1 Finished
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Materials World Network: Fast Analog Electrooptic Liquid Crystal Materials
Osipov, M. (Principal Investigator)
EPSRC (Engineering and Physical Sciences Research Council)
1/10/10 → 30/09/13
Project: Research