Covariance for Conic and Wedge Complete Filling

Details Covariance for Conic and Wedge Complete Filling Covariance for Conic and Wedge Complete Filling

2004-12-08

arxiv.org/abs/cond-mat/0412198v1

Physics

Condensed Matter

Statistical Mechanics

(4 pages, 2 figures)

Scientific paper

10.1103/PhysRevLett.94.096103

Interfacial phenomena associated with fluid adsorption in two dimensional systems has recently been shown to exhibit hidden symmetries, or covariances, which precisely relate local adsorption properties in different confining geometries. We show that covariance also occurs in three dimensional systems and is likely to be verifiable experimentally and in Ising model simulations studies. Specifically, we study complete wetting in wedge (W) and cone (C) geometries as bulk coexistence is approached and show that the equilibrium mid-point heights satisfy $l_c (h,\alpha)=l_w(\frac{h}{2} ,\alpha),$ where $h$ measures the partial pressure and $\alpha$ is the tilt angle. This covariance is valid for both short-ranged and long-ranged intermolecular forces and identifies both leading and next-to-leading order critical exponents and amplitudes in the confining geometries. Connection with capillary condensation-like phenomena is also made.

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