Dynamics of dislocations in the Twist-Grain-Boundary-A phase of liquid crystals

Tomoko Ota, Yasuyuki Kimura, Reinosuke Hayakawa

Research output: Contribution to journalArticle

Abstract

The superconductor-smectic A analogy by de Gennes has been successfully applied by Renn and Lubensky to predict the existence and mean field properties of the Twist-Grain-Boundary-A phase, which was independently discovered experimentally by Goodby and coworkers. We explore the possibility of extending this powerful analogy to aspects of the Twist-Grain-Boundary-A phase which require treatments going beyond the static mean field regime. Careful analysis reveals (1)the motion of a grain boundary as a liquid crystal analogue of the current-induced flux flow of the Abrikosov vortices, which can be realized either by applying the electric field in the helical axis direction, or by imposing a temperature gradient, and (2) the dynamical renormalization of effective Frank elastic constants resulting from the motion of the grain boundary. Implications of our findings for the vulnerability of the TGBA phase to thermal fluctuation is briefly discussed.

Original languageEnglish
Pages (from-to)125-133
Number of pages9
JournalFerroelectrics
Volume178
Issue number1-4
DOIs
Publication statusPublished - Jan 1 1996
Externally publishedYes

Fingerprint

Liquid Crystals
Dislocations (crystals)
Liquid crystals
Grain boundaries
grain boundaries
liquid crystals
vulnerability
Induced currents
Elastic constants
Thermal gradients
Superconducting materials
temperature gradients
Vortex flow
elastic properties
Electric fields
vortices
analogs
Fluxes
electric fields

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Dynamics of dislocations in the Twist-Grain-Boundary-A phase of liquid crystals. / Ota, Tomoko; Kimura, Yasuyuki; Hayakawa, Reinosuke.

In: Ferroelectrics, Vol. 178, No. 1-4, 01.01.1996, p. 125-133.

Research output: Contribution to journalArticle

Ota, Tomoko ; Kimura, Yasuyuki ; Hayakawa, Reinosuke. / Dynamics of dislocations in the Twist-Grain-Boundary-A phase of liquid crystals. In: Ferroelectrics. 1996 ; Vol. 178, No. 1-4. pp. 125-133.
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