20.500.12556/DKUM-66177 History-dependent patterns in randomly perturbed nematic liquid crystals 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. liquid crystals tekoči kristali true true true Wiley Angleški jezik Slovenski jezik Znanstveno delo 2017-06-14 09:16:07 2017-06-14 09:17:12 2025-12-23 12:28:59 2021-05-15 03:31:46 2013 0 0 str. 1-10 Letn. 2013 2013 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2013-04-04 2013-05-25 2013-06-12 1687-8108 53 23812647 26806567 10.1155/2013/505219 1687-8108 URN:SI:UM:DK:KACF0OLJ Advances_in_Condensed_Matter_Physics_2013_Ranjkesh_et_al._History-Dependent_Patterns_in_Randomly_Perturbed_Nematic_Liquid_Crystals.pdf Advances_in_Condensed_Matter_Physics_2013_Ranjkesh_et_al._History-Dependent_Patterns_in_Randomly_Perturbed_Nematic_Liquid_Crystals.pdf 1 2B832B03F418A4AD9E05188A238CF0EA ee58285f72c7f1b100c995f0c926d366de76f3ce6f0073cb1280098792f5f976 3d09230f-7c0e-11eb-bb7a-00155d0001ca https://dk.um.si/Dokument.php?lang=slv&id=112479 http://www.hindawi.com/journals/acmp/2013/505219/ 1 https://dk.um.si/Dokument.php?lang=slv&id=112478 Fakulteta za naravoslovje in matematiko 0 0 0