Column undulation instability in a discotic liquid crystal
Year: 1985
Type: article
Abstract: We present the first observation of an undulation instability of the columns in a tubular discotic liquid crystal when submitted to a dilation normal to the columns. This effect is very similar to the layer undulation in smectic materials. From the instability threshold and from the undulation wavelength, we derive a value, anomalously large, of the column curvature elastic constant, very close to the value obtained from observation of the column buckling under longitudinal compression. The static or dynamic origin of such a large curvature elastic constant is not understood.
Source: Journal de Physique Lettres
Authors: M. Gharbia, M. Cagnon, G. Durand
Institutions: Université Paris-Sud, Laboratoire de physique des Solides
Language: French
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1993841592