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Phase Behavior of Bent-Core Molecules

Authors
  • Lansac, Yves
  • Maiti, Prabal K.
  • Clark, Noel A.
  • Glaser, Matthew A.
Type
Preprint
Publication Date
Feb 08, 2002
Submission Date
Feb 08, 2002
Identifiers
DOI: 10.1103/PhysRevE.67.011703
arXiv ID: cond-mat/0202154
Source
arXiv
License
Unknown
External links

Abstract

Recently, a new class of smectic liquid crystal phases (SmCP phases) characterized by the spontaneous formation of macroscopic chiral domains from achiral bent-core molecules has been discovered. We have carried out Monte Carlo simulations of a minimal hard spherocylinder dimer model to investigate the role of excluded volume interations in determining the phase behavior of bent-core materials and to probe the molecular origins of polar and chiral symmetry breaking. We present the phase diagram as a function of pressure or density and dimer opening angle $\psi$. With decreasing $\psi$, a transition from a nonpolar to a polar smectic phase is observed near $\psi = 167^{\circ}$, and the nematic phase becomes thermodynamically unstable for $\psi < 135^{\circ}$. No chiral smectic or biaxial nematic phases were found.

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