Dislocation loops in overheated free-standing smectic films

Details Dislocation loops in overheated free-standing smectic films Dislocation loops in overheated free-standing smectic films

2001-10-11

arxiv.org/abs/cond-mat/0110249v1

Physical Review E, 65 (2002) 031715

Physics

Condensed Matter

Soft Condensed Matter

16 pages, 8 figures

Scientific paper

10.1103/PhysRevE.65.031715

Static and dynamic phenomena in overheated free-standing smectic-A films are studied using a generalization of de Gennes' theory for a confined presmectic liquid. A static application is to determine the profile of the film meniscus and the meniscus contact angle, the results being compared with those of a recent study employing de Gennes' original theory. The dynamical generalization of the theory is based on on a time-dependent Ginzburg-Landau approach. This is used to compare two modes for layer-thinning transitions in overheated films, namely "uniform thinning" vs. nucleation of dislocation loops. Properties such as the line tension and velocity of a moving dislocation line are evaluated self-consistently by the theory.

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