Picture of two heads

Open Access research that challenges the mind...

The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including those from the School of Psychological Sciences & Health - but also papers by researchers based within the Faculties of Science, Engineering, Humanities & Social Sciences, and from the Strathclyde Business School.

Discover more...

Microscopic origin of ferroelectricity in chiral smectic c* liquid crystals and ordering of 'ferroelectric fishes' proposed by de gennes

Osipov, M.A. and Gorkunov, M.V. (2009) Microscopic origin of ferroelectricity in chiral smectic c* liquid crystals and ordering of 'ferroelectric fishes' proposed by de gennes. Liquid Crystals, 36 (10-11). pp. 1281-1288. ISSN 0267-8292

Full text not available in this repository. (Request a copy from the Strathclyde author)

Abstract

The qualitative microscopic mechanism of ferroelectric ordering in smectic C* liquid crystals originally proposed by de Gennes and others is analysed in detail using the molecular-statistical approach. The general expression is obtained for the spontaneous polarisation of the smectic C* phase composed of chiral and polar molecules of the C2 symmetry. The polarisation is shown to be determined by molecular chirality, molecular transverse dipole and the non-polar biaxial order parameter which does not vanish in the non-chiral smectic C phase. A particular molecular model is considered in which molecular chirality and molecular biaxiality are determined by the pair of off-centre transverse molecular dipoles. In the context of this model the spontaneous polarisation is evaluated both analytically and numerically.