Non-locality and short-range wetting phenomena

Details Non-locality and short-range wetting phenomena Non-locality and short-range wetting phenomena

2004-07-20

arxiv.org/abs/cond-mat/0407531v1

Physics

Condensed Matter

Statistical Mechanics

4 pages, 2 figures, accepted for publication in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.93.086104

We propose a non-local interfacial model for 3D short-range wetting at planar and non-planar walls. The model is characterized by a binding potential \emph{functional} depending only on the bulk Ornstein-Zernike correlation function, which arises from different classes of tube-like fluctuations that connect the interface and the substrate. The theory provides a physical explanation for the origin of the effective position-dependent stiffness and binding potential in approximate local theories, and also obeys the necessary classical wedge covariance relationship between wetting and wedge filling. Renormalization group and computer simulation studies reveal the strong non-perturbative influence of non-locality at critical wetting, throwing light on long-standing theoretical problems regarding the order of the phase transition.

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