  We introduce a solid-on-solid growth process which evolves by random
deposition of dimers, surface diffusion, and evaporation of monomers from the
edges of plateaus. It is shown that the model exhibits a robust transition from
a smooth to a rough phase. The roughening transition is driven by an absorbing
phase transition at the bottom layer of the interface, which displays the same
type of critical behavior as the pair contact process with diffusion 2A->3A,
2A->0.
