Topological Confinement and Superconductivity
  We derive a Kondo Lattice model with a correlated conduction band from a two-band Hubbard Hamiltonian. This mapping allows us to describe the emergence of a robust pairing mechanism in a model that only contains repulsive interactions. The mechanism is due to topological confinement and results from the interplay between antiferromagnetism and delocalization. By using Density-Matrix-Renormalization-Group (DMRG), we demonstrate that this mechanism leads to dominant superconducting correlations in a 1D-system. 
K. A. Al-Hassanieh, C. D. Batista, P. Sengupta, A. E. Feiguin