Topological inclusions in 2D smectic C films
作者:
DAVID PETTEY,
T. C. LUBENSKY,
DARREN R. LINK,
期刊:
Liquid Crystals
(Taylor Available online 1998)
卷期:
Volume 25,
issue 5
页码: 579-587
ISSN:0267-8292
年代: 1998
DOI:10.1080/026782998205868
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
In thin films of smectic C liquid crystals, localized regions containing additional smectic layers form circular inclusions that carry a topological charge. Such inclusions nucleate a companion topological defect. These inclusion-defect pairs are modelled as topological dipoles within the context of a one-coupling constant approximation to the 2D Frank free energy. Deviations of the dipole direction from a preferred orientation cause the dipoles to acquire a logarithmic charge. Thermal fluctuations of the dipole direction are calculated and found to be large, scaling as the logarithm of the system size. In addition to dipole-dipole interactions arising from the topological charges, we also find that the thermal fluctuations of the dipole directions are coupled through a preference for global charge neutrality of the logarithmic charges.
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