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98-33E

98-33E


By icmp_admin - Posted on 08 February 2012

UDC: 
532.783:548-14; 536.425
PACS: 
61.30.Cz, 64.60.Cn, 02.70.Lq

On the nematic-isotropic transition in a lattice model with quenched disordered impurities. A Monte Carlo study.

Ja.M. Ilnytskyi
S. Soko{\l}owski
O. Pizio

We have performed Monte Carlo (MC) simulations of the lattice model mimicking liquid crystalline behavior in the presence of disordered quenched impurities. A well pronounced first order nematic-isotropic transition has been obtained for a bulk pure model. However, at a 5\% concentration of impurities, we have observed a very weak first order transition being suppreseed as compared to a pure case. We have discussed a shift of the transition temperature, a suppression of the latent heat and the maxima of the heat capacity and susceptibility due to the presence of impurities. A histogram analysis and a finite-size scaling has been applied to the MC data. A comparison of the simulation data with the experimental results for liquid crystals confined to silica aerogels and porous glasses also has been performed.

Year: 
1998
Pages: 
22
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