  Topological band insulators which are dynamically generated by
electron-electron interactions have been the- oretically proposed in two and
three dimensional lattice models. We present evidence that the two-dimensional
version can be stabilized in digital (111) heterostructures of transition-metal
oxides as a result of purely local interactions. The topological phases are
accompanied by spontaneous ordering of complex orbitals and we discuss their
stability with respect to the Hund's rule coupling, Jahn-Teller interaction and
inversion symmetry breaking terms. As main competitors we identify spin-nematic
and magnetic phases.
