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Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals
10:35

Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals

Published on: May 29, 2018

A phase-field-crystal model for liquid crystals.

Hartmut Löwen1

  • 1Institut für Theoretische Physik II, Weiche Materie, Heinrich-Heine-Universität Düsseldorf, D-40225 Düsseldorf, Germany.

Journal of Physics. Condensed Matter : an Institute of Physics Journal
|March 10, 2011
PubMed
Summary
This summary is machine-generated.

A new phase-field-crystal model integrates translational and orientational ordering for liquid crystals. This model captures diverse liquid crystal phases and dynamics, aiding nonequilibrium simulations.

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Area of Science:

  • Condensed matter physics
  • Materials science
  • Soft matter physics

Background:

  • Liquid crystals exhibit complex phases and dynamics.
  • Existing models may not fully capture both translational and orientational ordering.
  • Understanding these phenomena is crucial for materials design and applications.

Purpose of the Study:

  • To derive a comprehensive phase-field-crystal model for liquid crystals.
  • To incorporate both translational and orientational degrees of freedom.
  • To enable efficient numerical simulations of liquid crystal behavior.

Main Methods:

  • Utilizing static and dynamical density functional theory.
  • Developing a phase-field-crystal model with translational density and orientational order parameters.
  • Including a local director field to describe orientational ordering.

Main Results:

  • The model successfully describes isotropic, nematic, smectic A, columnar, plastic-crystalline, and orientationally ordered crystalline phases.
  • Translational density is identified as a conserved order parameter.
  • Orientational ordering is characterized as a non-conserved order parameter.

Conclusions:

  • The derived phase-field-crystal model provides a unified framework for studying liquid crystal phases.
  • The model's dynamics accurately reflect the distinct behaviors of translational and orientational ordering.
  • This model is suitable for efficient numerical investigations of nonequilibrium phenomena in liquid crystals.