Optically isotropic liquid-crystal phase of bent-core molecules with polar nanostructure

G. Liao, S. Stojadinovic, G. Pelzl, W. Weissflog, S. Sprunt, A. Jákli

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

We found that the optically isotropic (IM) 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 IM 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.

Original languageEnglish (US)
Article number021710
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Volume72
Issue number2
DOIs
StatePublished - Aug 1 2005

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Nanostructures
electric current
Liquid Crystal
spin glass
light scattering
liquid crystals
Molecules
electric fields
polarization
molecules
Dynamic Light Scattering
Electric Current
Spin Glass
Electric Field
Logarithmic
Polarization

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Statistics and Probability
  • Condensed Matter Physics

Cite this

Optically isotropic liquid-crystal phase of bent-core molecules with polar nanostructure. / Liao, G.; Stojadinovic, S.; Pelzl, G.; Weissflog, W.; Sprunt, S.; Jákli, A.

In: Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, Vol. 72, No. 2, 021710, 01.08.2005.

Research output: Contribution to journalArticle

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