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- W2154888644 abstract "We examine the influence of bidirectional anchoring on the unwinding of a planar cholesteric liquid crystal induced by the application of a magnetic field. We consider a liquid crystal layer confined between two plates with the helical axis perpendicular to the substrates. We fix the director twist on one boundary and allow for bidirectional anchoring on the other by introducing a high-order surface potential. By minimizing the total free energy for the system, we investigate the untwisting of the cholesteric helix as the liquid crystal attempts to align with the magnetic field. The transitions between metastable states occur as a series of pitchjumps as the helix expels quarter- or half-turn twists, depending on the relative sizes of the strength of the surface potential and the bidirectional anchoring. We show that secondary easy axis directions can play a significant role in the unwinding of the cholesteric in its transition towards a nematic, especially when the surface anchoring strength is large." @default.
- W2154888644 created "2016-06-24" @default.
- W2154888644 creator A5084622779 @default.
- W2154888644 date "2013-10-01" @default.
- W2154888644 modified "2023-09-27" @default.
- W2154888644 title "Unwinding of a cholesteric liquid crystal and bidirectional surface anchoring" @default.
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- W2154888644 doi "https://doi.org/10.1007/s10665-013-9668-z" @default.
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