SUBLATTICE ORDER PARAMETER IN THE BCSOS MODEL - A FINITE-SIZE MONTE-CARLO STUDY

We introduce and investigate via Monte Carlo simulation the finite-size critical behaviour of the body-centred-solid-on-solid (BCSOS) model's sublattice order parameter and related (staggered) susceptibility. We confirm the scaling ansatz of Baxter for the susceptibility, a quantity which has remained hitherto unexplored. We also verify the Kosterlitz-Thouless universality class in the temperature dependence of both these equilibrium properties. Our extrapolation for the location of the infinite system roughening transition temperature is in good agreement with the exact value.