  We introduce an interface growth model exhibiting a nonequilibrium roughening
transition (NRT). In the model, particles consist of two species, and deposit
or evaporate on one dimensional substrate according to a given dynamic rule.
When the dynamics is limited to occur on monolayer, this model has two
absorbing states, belonging to the directed Ising (DI) universality class. At
criticality, the density of vacant sites at the bottom layer in the growth
model decays faster than the DI behavior, however, the dynamic exponent is
close to the DI value, suggesting that the dynamics is related to the DI
universality class. We also consider an asymmetric version of the growth
dynamics, which is according to the directed percolation behavior.
