Skip to main content
Article thumbnail
Location of Repository

A molecular field theory for biaxial nematics composed of molecules with C_{2h} point group symmetry

By G.R. Luckhurst, S Naemura, T.J. Sluckin, T. To and S.S. Turzi

Abstract

The biaxial nematic phase is generally taken, either explicitly or implicitly, to have D2h point group<br/>symmetry. However, it is possible for the biaxial phase to have a lower symmetry depending on that of its constituent molecules. Here we develop a molecular field theory for a nematogen composed of C2h molecules in terms of the nine independent second rank orientational order parameters defining the C2h biaxial nematic. In addition there is a rank one order parameter constructed from two pseudovectors which is only non-zero in the C2h phase. The theory is simplified by removing all but the three dominant order parameters. The predicted phase behaviour is found to be rich with three possible biaxial nematic phases and with the transitions involving a biaxial nematic phase exhibiting tricritical points

Topics: QA, QC
Year: 2011
OAI identifier: oai:eprints.soton.ac.uk:181427
Provided by: e-Prints Soton

Suggested articles


To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.