Thermotropic Biaxial Nematics: Spontaneous or Field-Stabilized?

Details Thermotropic Biaxial Nematics: Spontaneous or Field-Stabilized? Thermotropic Biaxial Nematics: Spontaneous or Field-Stabilized?

2007-07-23

arxiv.org/abs/0707.3411v1

J. Chem. Phys. 128, 154512 (2008)

Physics

Condensed Matter

Soft Condensed Matter

2 eps Figures

Scientific paper

10.1063/1.2897993

An intermediate nematic phase is proposed for the interpretation of recent experimental results on phase biaxiality in bent-core nematics. The phase is macroscopically uniaxial but consists of microscopic biaxial, and possibly polar, domains. On applying an electric field the phase exhibits substantial macroscopic biaxial ordering resulting from the collective alignment of the domains. A phenomenological theory is developed for the molecular order in this phase and for its transitions to purely uniaxial and to spontaneously biaxial nematic phases.

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