  We present exactly solvable examples that topological Mott insulators can
emerge from topologically trivial states due to strong interactions between
atoms for atomic mixtures trapped in one-dimensional optical superlattice
systems. The topological Mott insulating state is characterized by nonzero
Chern number and appears in the strongly interacting limit as long as the total
band filling factor is an integer, which is not sensitive to the filling of
each component. The topological nature of the Mott phase can be revealed by
observing the density profile of the trapped system. Our results can be also
generalized to the multi-component atomic systems.
