Slavko Buček (Avtor), Samo Kralj (Avtor), T. J. Sluckin (Avtor)

Povzetek

We make a numerical study of hysteresis loop shapes within a generalized two-dimensional Random Anisotropy Nematic (RAN) model at zero temperature. The hysteresis loops appear on cycling a static external ordering field. Ordering in these systems is history dependent and involves the interplay between the internal coupling constant J, the anisotropy random field D, and the ordering external field H. Here the external field is represented by a traceless tensor, analogous to extension-type fields in continuum mechanics. The calculations use both a mean field approach and full lattice simulations. Our analysis suggests the existence of two qualitatively different solutions, which we denote as symmetric and symmetry breaking. For the set of parameters explored, only the symmetric solutions are stable. Both approaches yield qualitatively similar hysteresis curves, which are manifested either by single or double loops. But the quantitative differences indicate that mean field estimates are only of limited predictive value.

Ključne besede

histerezna zanka;tekoči kristali;mrežne simulacije;povprečno polje;hysteresis loop;liquid crystals;lattice simulations;mean field;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UM FNM - Fakulteta za naravoslovje in matematiko
UDK: 544.25
COBISS: 11869235 Povezava se bo odprla v novem oknu
ISSN: 1687-8124
Št. ogledov: 849
Št. prenosov: 329
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Slovenski jezik
Sekundarne ključne besede: histerezna zanka;tekoči kristali;mrežne simulacije;povprečno polje;
URN: URN:SI:UM:
Vrsta dela (COBISS): Znanstveno delo
Strani: str. 1-10
Letnik: ǂVol. ǂ2015
Čas izdaje: 2015
DOI: 10.1155/2015/834867
ID: 10842681