Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2006-05-02
Physics
Condensed Matter
Soft Condensed Matter
8 pages, 10 figures
Scientific paper
10.1103/PhysRevE.73.061703
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.
Roij René van
Schilling Tanja
Shundyak Kostya
Tanase Catalin
Wolfsheimer Stefan
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