Order reconstruction phenomena and temperature-driven dynamics in a 3D zenithally bistable device

A. Raisch, A. Majumdar

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Abstract

We model the zenithally bistable device (ZBD) in three dimensions (3D), within the Landau-de Gennes theory, and find three stable static states in 3D without an applied field: the vertically aligned nematic (VAN) state, the hybrid aligned nematic (HAN) state and a third, high-tilt state, which we call the THAN state, with an interior and a surface defect. We recover the order reconstruction (OR) phenomenon around the defects in the HAN and THAN states and the 3D THAN and HAN solutions exhibit stable biaxial cylinders connecting defects on opposite faces of the ZBD device. We demonstrate a two-way temperature-driven switching between high-tilt and low-tilt states through controlled heating and cooling procedures in two dimensions (2D), with no applied fields.
Original languageEnglish
Number of pages6
JournalEPL (Europhysics Letters)
Volume107
DOIs
Publication statusPublished - 7 Jul 2014

Keywords

  • defects in liquid crystals
  • order reconstruction phenomena
  • 3D zenithally bistable device
  • partial differential equations
  • liquid-crystal devices
  • display devices

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