JETP Letters

, Volume 96, Issue 5, pp 317–321

Structure of π- and 2π-Walls in Smectic films


  • P. V. Dolganov
    • Institute of Solid State PhysicsRussian Academy of Sciences
  • V. K. Dolganov
    • Institute of Solid State PhysicsRussian Academy of Sciences
  • P. Cluzeau
    • CNRS, Centre de Recherche Paul PascalUniversité Bordeaux I
Condensed Matter

DOI: 10.1134/S0021364012170043

Cite this article as:
Dolganov, P.V., Dolganov, V.K. & Cluzeau, P. Jetp Lett. (2012) 96: 317. doi:10.1134/S0021364012170043


The structure of π- and 2π-walls in smectic films was reconstructed from optical reflectivity measurements. Investigations were made in free standing films of nonpolar Smectic-C and ferroelectric Smectic-C* liquid crystals. π-walls are observed in magnetic field and 2π-walls in electric field parallel to the film plane. For the first time the distribution of molecular orientation across the walls was determined. Peculiarities of the wall structure related to the anisotropy of the film elasticity were found. The structure of the walls is well described by the theory taking into account the anisotropy of two-dimensional elasticity of smectic films.

Copyright information

© Pleiades Publishing, Ltd. 2012