Flexoelectric switching in a bistable nematic device

Davidson, A. J. and Mottram, N. J. (2002) Flexoelectric switching in a bistable nematic device. Physical Review E, 65(5), 051710. (doi: 10.1103/PhysRevE.65.051710) (PMID:12059580)

Full text not currently available from Enlighten.


We present a continuum theory model of switching in a bistable nematic liquid crystal device. The bistability of the device investigated relies on the fact that one of the cell surfaces exhibits two stable anchoring states, that is, two surface director orientations are locally stable. Since the other surface exhibits monostable, homeotropic anchoring there are two possible ground state director orientations within the cell, depending on the director orientation at the bistable surface. We first investigate the stability of these base states and find a critical surface anchoring strength below which only one of the states is stable. We also investigate the process of switching between the two stable states through the application of an electric field and the presence of a flexoelectric polarization. At high field strengths the dielectric interaction with the applied field will dominate the flexoelectric effect and may hinder switching. We find, therefore, that a window of possible field strengths exists within which switching occurs.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Mottram, Professor Nigel
Authors: Davidson, A. J., and Mottram, N. J.
College/School:College of Science and Engineering > School of Mathematics and Statistics > Mathematics
Journal Name:Physical Review E
Publisher:American Physical Society
ISSN (Online):1095-3787
Published Online:23 May 2002

University Staff: Request a correction | Enlighten Editors: Update this record