  The extended Hubbard model with an attractive density-density interaction,
positive pair hopping, or both, is shown to host topological phases, with a
doubly degenerate entanglement spectrum and interacting edge spins. This
constitutes a novel instance of topological order which emerges from
interactions. When the interaction terms combine in a charge-SU(2) symmetric
fashion, a novel partially polarized pseudospin phase appears, in which the
topological features of the spin degrees of freedom coexist with long-range
$\eta$-wave superconductivity. Thus, our system provides an example of an
interplay between spontaneous symmetry breaking and symmetry-protected
topological order that leads to novel and unexpected properties.
