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DC Field | Value | Language |
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dc.contributor.author | Roy, Arun | - |
dc.contributor.author | Madhusudana, N.V. | - |
dc.date.accessioned | 2007-06-26T09:54:12Z | - |
dc.date.available | 2007-06-26T09:54:12Z | - |
dc.date.issued | 2000 | - |
dc.identifier.citation | European Physical Journal E, 2000, Vol.1, p319-336 | en |
dc.identifier.issn | 1292-8941 | - |
dc.identifier.issn | 1292-895X(Online) | - |
dc.identifier.uri | http://hdl.handle.net/2289/3139 | - |
dc.description | Restricted Access. | en |
dc.description.abstract | We 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.extent | 607170 bytes | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | en | en |
dc.publisher | EDP Sciences | en |
dc.relation.uri | http://www.edpsciences.org/articles/epje/pdf/2000/03/b9538.pdf | en |
dc.rights | 2000 EDP Sciences | en |
dc.title | A chiral axial next nearest neighbour xy-model for antiferroelectric liquid crystals | en |
dc.type | Article | en |
Appears in Collections: | Research Papers (SCM) |
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File | Description | Size | Format | |
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2000 EPJ-E V1 p319.pdf Restricted Access | Restricted Access | 592.94 kB | Adobe PDF | View/Open Request a copy |
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