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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/3139
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dc.contributor.authorRoy, Arun-
dc.contributor.authorMadhusudana, N.V.-
dc.date.accessioned2007-06-26T09:54:12Z-
dc.date.available2007-06-26T09:54:12Z-
dc.date.issued2000-
dc.identifier.citationEuropean Physical Journal E, 2000, Vol.1, p319-336en
dc.identifier.issn1292-8941-
dc.identifier.issn1292-895X(Online)-
dc.identifier.urihttp://hdl.handle.net/2289/3139-
dc.descriptionRestricted Access.en
dc.description.abstractWe describe a chiral axial next nearest neighbour xy-model to account for the various subphases exhibited by antiferroelectric liquid crystals made of chiral rod-like molecules. The assumed form of the interlayer interactions is based on physical processes which are discussed. Using a discrete model, the predicted sequence of transitions is SmA-SmC$^*_\alpha$-SmC$^*_\beta$-FIH-FII-FIL-SmC*A, where FI stands for a ferriphase, as seen in many compounds. The ferri and SmC$^*_\alpha$ phases are characterized by relatively large angles between the c-vectors of successive layers and occur only when the compounds have high optical purity. The calculated field induced structures exhibit a plateau of the apparent tilt angle at $\sim\theta/3$, where $\theta$ is the tilt angle of the molecules in the ferriphase. The conoscopic figures in the presence of a field and ellipsometric parameters in the absence of a field have also been generated, which agree extremely well with the experimental results. Recent anomalous X-ray scattering studies prove the xy-character of the configurations, though the commensurate structures that are found in the ferriphase require an extension of the model to include lock-in terms.en
dc.format.extent607170 bytes-
dc.format.mimetypeapplication/pdf-
dc.language.isoenen
dc.publisherEDP Sciencesen
dc.relation.urihttp://www.edpsciences.org/articles/epje/pdf/2000/03/b9538.pdfen
dc.rights2000 EDP Sciencesen
dc.titleA chiral axial next nearest neighbour xy-model for antiferroelectric liquid crystalsen
dc.typeArticleen
Appears in Collections:Research Papers (SCM)

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