Publication Title

Physical Review Letters

Publication Date

7-8-2010

Document Type

Article

DOI

10.1103/PhysRevLett.105.027801

Keywords

Order Parameters, Viscous Properties, Molecular Theory, Transitions, Particles, Mixtures, Fluid

Disciplines

Physics

Abstract

Polarized Raman spectroscopy was used to investigate the development of orientational order and the degree of phase biaxiality in a bent-core mesogenic system. The values of the uniaxial order parameters ⟨P200⟩ and ⟨P400⟩, and biaxial order parameters ⟨P220⟩, ⟨P420⟩, and ⟨P440⟩, and their evolution with temperature were determined. The temperature dependence of almost all order parameters reveals a second order transition from the uniaxial to biaxial nematic phase with ⟨P220⟩ increasing to ∼0.22 before a first order transition to the smectic-C phase, upon cooling.

Comments

Copyright 2010 American Physical Society. Available on publisher's site at http://dx.doi.org/10.1103/PhysRevLett.105.027801.


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