Surface 2π-walls in polar free-standing smectic films
P. V. Dolganov, V. K. Dolganov, A. Fukuda+
Institute of Solid State Physics of the RAS, 142432 Chernogolovka, Russia
+Department of Electronic and Electrical Engineering, Trinity College, University of Dublin, Dublin 2, Ireland
Abstract
It was found that electric field in free-standing smectic
films at high temperature leads to formation of unusual
2π-walls, with quite different structure from the structure of
classical 2π-walls. The walls are formed by the change of
molecular orientation not only along the film plane (as in usual walls)
but also in smectic layers between two surfaces of the film. These walls are
nuclei of surface field-induced synclinic-anticlinic transition
between states with transverse and
longitudinal electric polarization.