Smectic A herringbone patterns

Samo Kralj (Author), Emmanuelle Lacaze (Author), George Cordoyiannis (Author), Zdravko Kutnjak (Author)

Abstract

Two qualitatively different SmA structures exhibiting herringbone-type layer patterns, to which we refer as the Defectless Smectic Herringbone (DSH) and the Dislocation Decorated Smectic Herringbone (DDSH) pattern are studied by a Landau-de Gennes-Ginzburg mesoscopic approach. Liquid crystal structures are described in terms of a nematic director field and a smectic complex order parameter. It is demonstrated that, in the proximity of the N-SmA phase transition, a melting of smectic layers could be realised even for relatively weakly-tilted smectic layers in DSH patterns (i.e. θt ≈ 100) for type I Sm4 phase. The width of melted region could be relatively large with respect to bulk values of the smectic characteristic lengths. In addition, a critical value of θt is determined at which a DDSH pattern is expected to appear.

Keywords

tekoči kristali;vzorci;strukturni prehodi;ne zaključna dela;liquid crystals;patterns;structural transitions;

Data

Language:	English
Year of publishing:	2014
Typology:	1.08 - Published Scientific Conference Contribution
Organization:	IJS - Jožef Stefan Institute
UDC:	532.783
COBISS:	21038344
ISSN:	1742-6596
Views:	2045
Downloads:	373
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	Slovenian
Secondary keywords:	Fizika;Mehanika tekočin;Tekoči kristali;
URN:	URN:SI:UM:
Type (COBISS):	Article
Pages:	Str. 1-10
DOI:	10.1088/1742-6596/558/1/012009
ID:	10845296