Surface Free Energies and Surface Critical Behaviour of the ABF Models with Fixed Boundaries

Details Surface Free Energies and Surface Critical Behaviour of the ABF Models with Fixed Boundaries Surface Free Energies and Surface Critical Behaviour of the ABF Models with Fixed Boundaries

1995-11-16

arxiv.org/abs/cond-mat/9511081v1

J.Phys. A30 (1997) 2353-2366

Physics

Condensed Matter

10 pages, latex2e with the amsmath and amsfonts packages

Scientific paper

10.1088/0305-4470/30/7/017

In a previous paper, we introduced reflection equations for interaction-round-a-face (IRF) models and used these to construct commuting double-row transfer matrices for solvable lattice spin models with fixed boundary conditions. In particular, for the Andrews-Baxter-Forrester (ABF) models, we derived special functional equations satisfied by the eigenvalues of the commuting double-row transfer matrices. Here we introduce a generalized inversion relation method to solve these functional equations for the surface free energies. Although the surface free energies depend on the boundary spins we find that the associated surface critical exponent $\alpha_s=(7-L)/4$ is independent of the choice of boundary.

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