Abstract
We provide a complete description of the low temperature wetting transition for the two dimensional solid-on-solid model. More precisely, we study the integer-valued field \({(\phi(x))_{x\in \mathbb{Z}^2}}\), associated associated with the energy functional
Since the pioneering work Chalker [15], it is known that for every \({\beta}\), there exists \({h_{w}(\beta) > 0}\) delimiting a transition between a delocalized phase (\({h < h_{w}(\beta)}\)) where the proportion of points at level zero vanishes, and a localized phase (\({h > h_{w}(\beta)}\)) where this proportion is positive. We prove in the present paper that for \({\beta}\) sufficiently large we have
Furthermore, we provide a sharp asymptotic for the free energy at the vicinity of the critical line: We show that close to \({h_w(\beta)}\), the free energy is approximately piecewise affine and that the points of discontinuity for the derivative of the affine approximation forms a geometric sequence accumulating on the right of \({h_w(\beta)}\). This asymptotic behavior provides strong evidence for the conjectured existence of countably many “layering transitions” at the vicinity of the wetting line, corresponding to jumps for the typical height of the field.
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Lacoin, H. Wetting and Layering for Solid-on-Solid I: Identification of the Wetting Point and Critical Behavior. Commun. Math. Phys. 362, 1007–1048 (2018). https://doi.org/10.1007/s00220-018-3162-4
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DOI: https://doi.org/10.1007/s00220-018-3162-4