Model of dark conglomerate structure in the B2 phase of bent-shaped molecules

0393050 - FZÚ 2014 RIV US eng J - Journal Article
Lejček, Lubor - Glogarová, Milada - Novotná, Vladimíra
Model of dark conglomerate structure in the B2 phase of bent-shaped molecules.
Physical Review E. Roč. 87, č. 4 (2013), "042503-1"-"042503-7". ISSN 1539-3755
R&D Projects: GA ČR(CZ) GAP204/11/0723
Grant - others:GA ČR(CZ) 13-14133S
Institutional support: RVO:68378271
Keywords : liquid crystals with bent-shaped molecules * dark conglomerate structure * focal conic domains
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 2.326, year: 2013

Texture observations in B2 phase of bent-shaped molecules showed a coexistence of so-called dark conglomerate (DC) structure with fan-shaped texture composed of focal conic domains (FCDs). A model of DC structure based on grains of dimension lower than visible wavelengths is proposed and used to compare the energies of DC and FCD structures. The comparison of energies of both structures enables the estimation of approximate model parameters. Reorientation of smectic layers in grains under an electric field and transformation into the system of FCD structure are discussed.
Permanent Link: http://hdl.handle.net/11104/0221798