6533b85bfe1ef96bd12baa79
RESEARCH PRODUCT
Isotropic-nematic interface in suspensions of hard rods: Mean-field properties and capillary waves
Kostya ShundyakR. Van RoijS. WolfsheimerTanja SchillingC. Tanasesubject
Capillary waveCondensed matter physicsField (physics)Monte Carlo methodIsotropy: Physics [G04] [Physical chemical mathematical & earth Sciences]FOS: Physical sciencesCondensed Matter - Soft Condensed MatterCondensed Matter::Soft Condensed MatterMean field theory: Physique [G04] [Physique chimie mathématiques & sciences de la terre]Liquid crystalNatuur- en SterrenkundeSoft Condensed Matter (cond-mat.soft)Density functional theoryAnisotropyMathematicsdescription
We present a study of the isotropic-nematic interface in a system of hard spherocylinders. First we compare results from Monte Carlo simulations and Onsager density functional theory for the interfacial profiles of the orientational order parameter and the density. Those interfacial properties that are not affected by capillary waves are in good agreement, despite the fact that Onsager theory overestimates the coexistence densities. Then we show results of a Monte Carlo study of the capillary waves of the interface. In agreement with recent theoretical investigations (Eur.Phys.J. E {\bf 18} 407 (2005)) we find a strongly anistropic capillary wave spectrum. For the wave-numbers accessed in our simulations, the spectrum is quadratic, i.e.elasticity does not play a role. We conjecture that this effect is due to the strong bending rigidity of the director field in suspensions of spherocylinders.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2006-05-02 |