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Simulating defect textures on relaxing nematic shells.

Badel L Mbanga1, Kate K Voorhes1, Timothy J Atherton1

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Summary
This summary is machine-generated.

Two nematic shells merge to minimize tension, evolving defect textures. Simulations reveal defect pair annihilation during coalescence, influenced by shell size and neck curvature.

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Area of Science:

  • Soft matter physics
  • Liquid crystal science

Background:

  • Nematic shells coalesce to reduce interfacial tension.
  • Topological transitions in shells lead to equilibrium states.

Purpose of the Study:

  • Investigate defect textures during nematic shell coalescence.
  • Analyze director field and defect valence evolution.
  • Determine mechanisms of defect pair annihilation.

Main Methods:

  • Quasistatic investigation by varying shell sizes.
  • Large-scale computer simulations of coalescing shells.

Main Results:

  • Observed regimes with positive and negative defects due to negative Gaussian curvature at the neck.
  • Identified selection mechanisms for annihilating defect pairs.
  • Determined the stage of coalescence for defect annihilation.

Conclusions:

  • Coalescence of nematic shells involves complex defect dynamics.
  • Shell size and geometry significantly influence defect behavior.
  • Simulations provide insights into topological defect evolution in soft matter systems.