INTERFACE TENSIONS AND PERFECT WETTING IN THE 2-DIMENSIONAL 7-STATE POTTS-MODEL

We present a numerical determination of the order-disorder interface t ension, sigma(od), for the two-dimensional seven-state Potts model. We find sigma(od) = 0.01 14 +/- 0.0012, in good agreement with expectati ons based on the conjecture of perfect wetting. We take into account s ystematic effects on the technique of our choice: the histogram method . Our measurements are performed on rectangular lattices, so that the histograms contain identifiable plateaus. The lattice sizes are chosen to be large compared to the physical correlation length. Capillary wa ve corrections are applied to our measurements on finite systems.