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Journal articles
Zigzag instability of a chi disclination line in a cholesteric liquid crystal
Abstract : We studied the formation of chi disclination lines in planar cholesteric samples placed in a temperature gradient near the cholesteric to smectic A phase transition. We observed that the first simple line which forms close to the smectic-cholesteric front zigzags when it is perpendicular to the direction of planar anchoring and is straight for other orientations. This instability is similar to Herring instability for crystalline surfaces. We show numerically that it originates from a strong increase of the elastic anisotropy close to the transition. In addition, we propose a new method to measure the pitch divergence at the smectic to cholesteric phase transition.
Cited literature [18 references]
https://hal-ens-lyon.archives-ouvertes.fr/ensl-00182727
Contributor : Patrick Oswald Connect in order to contact the contributor
Submitted on : Friday, October 26, 2007 - 7:53:29 PM
Last modification on : Wednesday, January 13, 2021 - 8:02:02 PM
Long-term archiving on: : Monday, April 12, 2010 - 12:50:52 AM
Contributor : Patrick Oswald Connect in order to contact the contributor
Submitted on : Friday, October 26, 2007 - 7:53:29 PM
Last modification on : Wednesday, January 13, 2021 - 8:02:02 PM
Long-term archiving on: : Monday, April 12, 2010 - 12:50:52 AM
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Dequidt-oswald06.pdf
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