Twist-bend nematic liquid crystals in high magnetic fields

P. K. Challa*, V. Borshch, O. Parri, C. T. Imrie, S. N. Sprunt, J. T. Gleeson, O. D. Lavrentovich, A. Jakli

*Corresponding author for this work

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69 Citations (Scopus)

Abstract

We present magneto-optic measurements on two materials that form the recently discovered twist-bend nematic (N-tb) phase. This intriguing state of matter represents a fluid phase that is orientationally anisotropic in three directions and also exhibits translational order with periodicity several times larger than the molecular size. N-tb materials may also spontaneously form a visible, macroscopic stripe texture. We show that the optical stripe texture can be persistently inhibited by a magnetic field, and a 25T external magnetic field depresses the N-N-tb phase transition temperature by almost 1 degrees C. We propose a quantitative mechanism to account for this shift and suggest a Helfrich-Hurault-type mechanism for the optical stripe formation.

Original languageEnglish
Article number060501
Number of pages5
JournalPhysical Review. E, Statistical, Nonlinear and Soft Matter Physics
Volume89
Issue number6
DOIs
Publication statusPublished - 6 Jun 2014

Keywords

  • BANANA-SHAPED MOLECULES
  • ORIENTATIONAL ORDER
  • PHASE
  • DIMERS
  • INSTABILITY
  • CHEVRON

Cite this

Challa, P. K., Borshch, V., Parri, O., Imrie, C. T., Sprunt, S. N., Gleeson, J. T., Lavrentovich, O. D., & Jakli, A. (2014). Twist-bend nematic liquid crystals in high magnetic fields. Physical Review. E, Statistical, Nonlinear and Soft Matter Physics, 89(6), [060501]. https://doi.org/10.1103/PhysRevE.89.060501