Publication Title

Physical Review E

Publication Date

8-15-2005

Document Type

Article

DOI

10.1103/PhysRevE.72.021710

Keywords

banana-shaped Mesogens, Nematic phase, achiral molecules, blue phases, relaxation, transition, Mesophase, states, field, B-2

Disciplines

Physics

Abstract

We found that the optically isotropic (I-M) mesophase observed recently below the nematic phase of the bent-core liquid crystal 4-chlororesorcinol bis[4-(4-n-dodecyloxybenzoyloxy)benzoate] shows ferroelectric-type switching. Polarizing microscopic, electric current, dielectric, and dynamic light scattering studies lead us to propose that the I-M phase is composed of interconnected orthoconic racemic smectic (Sm-CaPF) nanodomains with random layer orientations. Near the nematic phase, where the polarization can be saturated by electric fields, the system responds in a fashion analogous to the granular structure of a magnetic spin glass-in particular, we observed that the relaxation back to the nonpoled structure follows a similar, inverse logarithmic rule.

Comments

Copyright 2005 American Physical Society. Available on publisher's site at http://dx.doi.org/10.1103/PhysRevE.72.021710


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