Computing the Roughening Transition of Ising and Solid-On-Solid Models by BCSOS Model Matching

Details Computing the Roughening Transition of Ising and Solid-On-Solid Models by BCSOS Model Matching Computing the Roughening Transition of Ising and Solid-On-Solid Models by BCSOS Model Matching

1996-05-03

arxiv.org/abs/cond-mat/9605019v1

J.Phys.A30:63-80,1997

Physics

Condensed Matter

25 pages, LaTeX file, no figures

Scientific paper

10.1088/0305-4470/30/1/006

We study the roughening transition of the dual of the 2D XY model, of the Discrete Gaussian model, of the Absolute Value Solid-On-Solid model and of the interface in an Ising model on a 3D simple cubic lattice. The investigation relies on a renormalization group finite size scaling method that was proposed and successfully tested a few years ago. The basic idea is to match the renormalization group flow of the interface observables with that of the exactly solvable BCSOS model. Our estimates for the critical couplings are $\beta_R^{XY}=1.1199(1)$, $K_R^{DG}=0.6653(2)$ and $K_R^{ASOS}=0.80608(2)$ for the XY-model, the Discrete Gaussian model and the Absolute Value Solid-On-Solid model, respectively. For the inverse roughening temperature of the Ising interface we find $K_R^{Ising}= 0.40758(1)$. To the best of our knowledge, these are the most precise estimates for these parameters published so far.

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