Asymmetric counter propagation of domain walls

Artículo de publicación ISIFar from equilibrium systems show different states and domain walls between them. These walls, depending on the type of connected equilibria, exhibit a rich spatiotemporal dynamics. Here, we investigate the asymmetrical counter propagation of domain walls in an in-plane switching cell filled with a nematic liquid crystal. Experimentally, we characterize the shape and speed of the domain walls. Based on the molecular orientation, we infer that the counter propagative walls have different elastic deformations. These deformations are responsible of the asymmetric counter propagating fronts. Theoretically, based on symmetry arguments, we propose a simple bistable model under the influence of a nonlinear gradient, which qualitatively describes the observed dynamics. (C) 2015 Elsevier B.V. All rights reserved.FONDECYT, Region Nord- Pas-de-Calais, Centre National de la Recherche Scientifique (CNRS), Ministry of Higher Education and Research, Nord-Pas de Calais Regional Council, European Regional Development Fund (ERDF) through the Contrat de Projets Etat-Region (CPER), Agence Nationale de la Recherche through the LABEX CEMPI projec