an:07128376
Zbl 07128376
Lacoin, Hubert
Wetting and layering for solid-on-solid. II: Layering transitions, Gibbs states, and regularity of the free energy
EN
J. ??c. Polytech., Math. 7, 1-62 (2020).
00442185
2020
j
60K35 60K37 82B27 82B44
solid-on-solid; wetting; layering transitions; Gibbs states
Summary: We consider the Solid-on-Solid model interacting with a wall, which is the statistical mechanics model associated with the integer-valued field \((\phi (x))_{x\in \mathbb{Z}^2}\), and the energy functional \[V(\phi )=\beta \sum _{x\sim y}|\phi (x)-\phi (y)|-\sum _x\left(h\mathbf{1}_{\{ \phi (x)=0\} }-\infty \mathbf{1}_{\{ \phi (x)<0\} } \right).\] We prove that for \(\beta\) sufficiently large, there exists a decreasing sequence \((h^*_n(\beta ))_{n\ge 0}\), satisfying \(\lim_{n\rightarrow \infty }h^*_n(\beta )=h_w(\beta)\), and such that: \((A)\) The free energy associated with the system is infinitely differentiable on \(\mathbb{R} \smallsetminus \left(\{ h^*_n\} _{n\ge 1}\cup h_w(\beta )\right)\), and not differentiable on \(\{ h^*_n\} _{n\ge 1}. (B)\) For each \(n\ge 0\) within the interval \((h^*_{n+1},h^*_n)\) (with the convention \(h^*_0=\infty)\), there exists a unique translation invariant Gibbs state which is localized around height \(n\), while at a point of non-differentiability, at least two ergodic Gibbs states coexist. The respective typical heights of these two Gibbs states are \(n-1\) and \(n\). The value \(h^*_n\) corresponds thus to a first order layering transition from level \(n\) to level \(n-1\). These results combined with those obtained in Part I [the author, Commun. Math. Phys. 362, No. 3, 1007--1048 (2018; Zbl 1398.82023)] provide a complete description of the wetting and layering transition for SOS.
Zbl 1398.82023