Roughening transitions of finite order

Abstract

It is shown that an asymmetric body-centered solid-on-solid model undergoes two roughening transitions, one of the Ising type ($\alpha =0\mathrm{}$) the other with $\alpha =-2\mathrm{}$. The model is further studied in the presence of screw dislocations and new evidence is provided for Kadanoff's conjecture that the Baxter line should appear in such a roughening model.