Theory and simulation of freeze-fracture in cholesteric liquid crystals

D. W. Berreman, S. Meiboom, J. A. Zasadzinski, M. J. Sammon

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Abstract

A theory of fracture in spatially varying anisotropic glass is developed to interpret electron micrographs of freeze-fractured surfaces of cholesteric samples. The expression for energy per unit area released by crack formation is [n(1+bQ1)n]12, where Q1 is the traceless Landau tensor for unit order parameter and n is a unit vector normal to the crack surface. The two parameters of the theory are b, which is a function of the ratio of length to width of molecule, and a crack-precursor length. Contours closely matching those observed in the laminar cholesteric texture and in blue phase I are generated.

Original languageEnglish (US)
Pages (from-to)1737-1740
Number of pages4
JournalPhysical review letters
Volume57
Issue number14
DOIs
StatePublished - 1986

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Copyright 2015 Elsevier B.V., All rights reserved.

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