Minimality conditions for wave speed in anisotropic smectic C* liquid crystals

Elaine C. M. Crooks, Michael Grinfeld, Geoffrey McKay

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2 Citations (Scopus)
30 Downloads (Pure)


We discuss minimality conditions for the speed of monotone travelling waves in a sample of smectic C* liquid crystal subject to a constant electric field, dealing with both isotropic and anisotropic cases. Such conditions are important in understanding the properties of domain wall switching across a smectic layer, and our focus here is on examining how the presence of anisotropy can affect the speed of this switching. We obtain an estimate of the influence of anisotropy on the minimal speed, sufficient conditions for linear and non-linear minimal speed selection mechanisms to hold in different parameter regimes, and a characterisation of the boundary separating the linear and non-linear regimes in parameter space.
Original languageEnglish
Pages (from-to)88-102
Number of pages15
JournalMathematical Methods in the Applied Sciences
Issue number1
Early online date18 Sept 2017
Publication statusPublished - 21 Dec 2018


  • smectic C* liquid crystals
  • travelling waves
  • minimality conditions
  • variational principles
  • anisotropy


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