Competing orders in a bilayer Hubbard model

Hybridization between local orbitals and itinerant electrons is substantial in many strongly correlated materials. We study a model of itinerant electrons hybridized with a strongly interacted Hubbard layer by using numerically exact determinant quantum Monte Carlo (DQMC) simulations. In a specific range of interlayer hopping, we observe that the pairing vertex associated with PDW order becomes more attractive than that for uniform d-wave pairing when both layers are nearly half-filled. On the other hand, when the Hubbard layer is hole doped and the non-interacting layer is almost empty, we show that both layers develop antiferromagnetism, instead of spin stripes, in a similar range of interlayer hopping.