History-Dependent Patterns in Randomly Perturbed Nematic Liquid Crystals
Joint Authors
Ambrožič, M.
Ranjkesh, A.
Kutnjak, Z.
Kralj, S.
Cordoyiannis, G.
Source
Advances in Condensed Matter Physics
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-06-12
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
We study the characteristics of nematic structures in a randomly perturbed nematic liquid crystal (LC) phase.
We focus on the impact of the samples history on the universal behavior.
The obtained results are of interest for every randomly perturbed system exhibiting a continuous symmetry-breaking phase transition.
A semimicroscopic lattice simulation is used where the LC molecules are treated as cylindrically symmetric, rod-like objects interacting via a Lebwohl-Lasher (LL) interaction.
Pure LC systems exhibit a first order phase transition into the orientationally ordered nematic phase at T=Tc on lowering the temperature T.
The orientational ordering of LC molecules is perturbed by the quenched, randomly distributed rod-like impurities of concentration p.
Their orientation is randomly distributed, and they are coupled with the LC molecules via an LL-type interaction.
Only concentrations below the percolation threshold are considered.
The key macroscopic characteristics of perturbed LC structures in the symmetry-broken nematic phase are analyzed for two qualitatively different histories at T≪Tc.
We demonstrate that, for a weak enough interaction among the LC molecules and impurities, qualitatively different history-dependent states could be obtained.
These states could exhibit either short-range, quasi-long-range, or even long-range order.
American Psychological Association (APA)
Ranjkesh, A.& Ambrožič, M.& Cordoyiannis, G.& Kutnjak, Z.& Kralj, S.. 2013. History-Dependent Patterns in Randomly Perturbed Nematic Liquid Crystals. Advances in Condensed Matter Physics،Vol. 2013, no. 2013, pp.1-10.
https://search.emarefa.net/detail/BIM-476948
Modern Language Association (MLA)
Ranjkesh, A.…[et al.]. History-Dependent Patterns in Randomly Perturbed Nematic Liquid Crystals. Advances in Condensed Matter Physics No. 2013 (2013), pp.1-10.
https://search.emarefa.net/detail/BIM-476948
American Medical Association (AMA)
Ranjkesh, A.& Ambrožič, M.& Cordoyiannis, G.& Kutnjak, Z.& Kralj, S.. History-Dependent Patterns in Randomly Perturbed Nematic Liquid Crystals. Advances in Condensed Matter Physics. 2013. Vol. 2013, no. 2013, pp.1-10.
https://search.emarefa.net/detail/BIM-476948
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-476948