Memory effects in randomly perturbed systems exhibiting continuous symmetry breaking

Matej Cvetko (Author), Milan Ambrožič (Author), Samo Kralj (Author)

Abstract

We studied pattern characteristics in randomly perturbed structures exhibitingcontinuous symmetry breaking. A Lebwohl-Lasher-type lattice model was used which described well the onset of orientational ordering of a system of rod-like objects. For example, such systems mimic the orientational ordering tendency in liquid crystals or in an ensemble of nanotubes. We set impurities to impose a random anisotropy type of disorder on the objects. Structural characteristics were studied as a function of concentration of impurities, interaction strength w between impurities and rod-like objects, external ordering strength and history of samples. We showed that the characteristic linear size of patterns and range of ordering strongly depend on the history of samples for weak enough strength w. The two-dimensional and three-dimensional simulations yielded qualitatively similar results.

Keywords

tekoči kristali;spomin;nanodelci;liquid crystals;memory effect;nanotubes;structural order;percolation;

Data

Language:	English
Year of publishing:	2009
Typology:	1.01 - Original Scientific Article
Organization:	UM FNM - Faculty of Natural Sciences and Mathematics
UDC:	620.1/.2
COBISS:	16708616
ISSN:	0267-8292
Views:	1222
Downloads:	100
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary keywords:	tekoči kristali;spomin;nanodelci;
URN:	URN:SI:UM:
Pages:	str. 33-41
Volume:	ǂVol. ǂ36
Issue:	ǂno. ǂ1
Chronology:	Jan 2009
DOI:	10.1080/02678290802638431
ID:	8723943