Smectic A herringbone patterns

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

Povzetek

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.

Ključne besede

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

Podatki

Jezik:	Angleški jezik
Leto izida:	2014
Tipologija:	1.08 - Objavljeni znanstveni prispevek na konferenci
Organizacija:	IJS - Institut Jožef Stefan
UDK:	532.783
COBISS:	21038344
ISSN:	1742-6596
Št. ogledov:	2045
Št. prenosov:	373
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

Sekundarni jezik:	Slovenski jezik
Sekundarne ključne besede:	Fizika;Mehanika tekočin;Tekoči kristali;
URN:	URN:SI:UM:
Vrsta dela (COBISS):	Članek v reviji
Strani:	Str. 1-10
DOI:	10.1088/1742-6596/558/1/012009
ID:	10845296