Disclination core structure and induced phase change in nematic liquid crystals

NJ Mottram, S J Hogan

Research output: Working paperWorking paper and Preprints

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Using a continuum theory which allows for changes in variables which represent the phase and biaxiality of the liquid crystal as well as the director field, the core structure of +/- 1/2 and +/-1 strength disclination lines is investigated. Under certain approximations analytical solutions are found near to the centre of the disclination. Good agreement is found with numerical solutions for the full problem. Using a continuation package (AUTO), the changes to these numerical solutions are then considered as various parameters are altered. The model exhibits a first order phase transition near to the clearing point temperature induced by the presence of the disclination core. If the disclination was not present this phase transition would occur when the liquid crystalline state loses stability at a higher temperature
Original languageEnglish
PublisherUniversity of Bristol
Number of pages33
Publication statusPublished - 1996

Bibliographical note

Additional information: Later published by the Royal Society, Philosophical Transactions of the Royal Society of London Series A-Mathematical Physical and Engineering Sciences 355 (1731): 2045-2064 October 15, 1997


  • liquid crystal
  • core structure
  • first order phase transition
  • disclination core
  • continuum theory
  • continuation

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