Double helices folding half parabolic focal conics in chiral smectics
In this paper, we report the existence of a double helix folding a part of one of two cofocal parabolae. We observe the winding/unwinding of the double helix as temperature is changed and this mechanism is accompanied here by a change of the latus rectum p of the corresponding parabola.
We propose a model of the layers inside and outside the double helix consistent with experimental observations.
Keywords: defects; focal conic domains; parabolic focal conic domains; smectic A
Document Type: Research Article
Affiliations: 1: Laboratoire de Physique des Systemes Complexes, Universite de Picardie Jules Verne, Amiens, France 2: Laboratoire de Nanotechnologies et d'Instrumentation Optique, UTT, Troyes, France
Publication date: 01 June 2011
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