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Boundary effects in chiral polymer hexatics

Kamien1, Levine

  • 1Departments of Physics and Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA.

Physical Review Letters
|October 6, 2000
PubMed
Summary

Boundary effects can significantly alter liquid-crystalline phases. This study reveals that a chiral-hexatic phase can appear as a 3D N+6 phase due to these boundary effects, potentially explaining recent polymer hexatic discoveries.

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Area of Science:

  • Condensed matter physics
  • Materials science
  • Liquid crystal physics

Background:

  • Liquid-crystalline phases exhibit long-ranged orientational correlations.
  • Boundary effects can significantly influence the behavior of these phases.
  • Recent discoveries include a novel

Purpose of the Study:

  • To investigate the impact of boundary effects on liquid-crystalline phases.
  • To determine if boundary effects can induce a chiral-hexatic phase to appear as a 3D N+6 phase.
  • To explore the implications for recently discovered polymer hexatic materials.

Main Methods:

  • Theoretical analysis of boundary effects in liquid crystals.
  • Numerical estimations to model phase behavior.
  • Comparison of theoretical predictions with experimental observations of polymer hexatics.

Main Results:

  • Boundary effects can cause substantial alterations in liquid-crystalline phases.
  • The chiral-hexatic phase can be locked into an apparent three-dimensional N+6 phase.
  • Numerical estimates support this phase locking mechanism.

Conclusions:

  • Boundary effects are crucial for understanding liquid crystal phase behavior.
  • The observed chiral-hexatic to 3D N+6 phase transition is a significant finding.
  • This phenomenon may explain the nature of the recently discovered polymer hexatic.

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