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dc.contributor.authorCornford, Stephen Leslieen_GB
dc.contributor.authorTaphouse, T. S.en_GB
dc.contributor.authorSambles, J. Royen_GB
dc.contributor.departmentUniversity of Exeter; HP Labs, Bristolen_GB
dc.date.accessioned2009-03-06T16:03:03Zen_GB
dc.date.accessioned2011-01-25T11:54:19Zen_GB
dc.date.accessioned2013-03-20T13:00:55Z
dc.date.issued2009en_GB
dc.description.abstractAn optical waveguide experiment was used to study the influence of dc electric fields on a hybrid aligned nematic liquid crystal cell. This dc switching differed from ac switching in two ways: first, the equilibrium states depended on the sign of the applied voltage, and second, there was transient activity over long (~100 ms) timescales. To understand both of these, a numerical model of the cell's dynamics, which included both the Ericksen–Leslie theory and a drift-diffusion model of mobile ions, has been developed. Comparing modelling with observations, we find that the transients are caused by the motion of tiny concentrations of ionic impurities, and that the sign dependence is caused by an asymmetric distribution of surface charge, rather than the flexoelectric effect.en_GB
dc.identifier.citation11, article 013045en_GB
dc.identifier.doi10.1088/1367-2630/11/1/013045en_GB
dc.identifier.urihttp://hdl.handle.net/10036/52715en_GB
dc.language.isoenen_GB
dc.publisherInstitute of Physics and Deutsche Physikalische Gesellschaften_GB
dc.relation.urlhttp://dx.doi.org/10.1088/1367-2630/11/1/013045en_GB
dc.relation.urlhttp://www.iop.org/EJ/abstract/1367-2630/11/1/013045en_GB
dc.titleAnalysis of the sign-dependent switching observed in a hybrid aligned nematic cellen_GB
dc.typeArticleen_GB
dc.date.available2009-03-06T16:03:03Zen_GB
dc.date.available2011-01-25T11:54:19Zen_GB
dc.date.available2013-03-20T13:00:55Z
dc.identifier.issn1367-2630en_GB
dc.descriptionCopyright © 2009 IOP Publishing Ltd and Deutsche Physikalische Gesellschaft. This is the published version of an article published in New Journal of Physics Vol. 11, article 013045. DOI: 10.1088/1367-2630/11/1/013045en_GB
dc.identifier.journalNew Journal of Physicsen_GB


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