Double helices folding half parabolic focal conics in chiral smectics (original) (raw)

Double helices folding half parabolic focal conics in chiral smectics

Liquid Crystals, 2011

Abstract

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

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