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Asymmetric counterpropagating fronts without flow.

I Andrade-Silva1, M G Clerc1, V Odent1,2

  • 1Departamento de Física, Facultad de Ciencias Físicas y Matemáticas, Universidad de Chile, Casilla 487-3, Santiago, Chile.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
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Summary
This summary is machine-generated.

Domain walls in out-of-equilibrium systems show complex dynamics. This study reveals asymmetric front propagation in nematic liquid crystals due to dissimilar elastic deformations, accurately modeled theoretically.

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Area of Science:

  • Physics
  • Materials Science
  • Soft Matter Physics

Background:

  • Out-of-equilibrium systems feature domain walls between distinct states.
  • These domain walls can exhibit complex spatiotemporal dynamics based on connected states.

Purpose of the Study:

  • Investigate the asymmetrical counterpropagation of fronts in an in-plane-switching nematic liquid crystal cell.
  • Characterize front shapes, propagation speeds, and the underlying mechanisms of asymmetry.

Main Methods:

  • Experimental observation and characterization of front dynamics.
  • Development and application of a phenomenological model to describe the observed dynamics.

Main Results:

  • Observed distinct front shapes and propagation speeds.
  • Identified dissimilar elastic deformations as the cause of asymmetric front speeds.
  • Achieved fair agreement between experimental observations and theoretical modeling.

Conclusions:

  • Asymmetric front propagation in nematic liquid crystals is driven by elastic deformations.
  • The phenomenological model effectively captures the observed dynamics.
  • Provides insights into the behavior of domain walls in soft matter systems.