Topological superconductors in correlated topological insulators on the honeycomb lattice

The paper realizes a topological superconductor (TSC) in correlated topological insulator – the interacting spinful Haldane model. The electrons on the Haldane model with on-site attractive interaction are studied based on mean field theory and random-phase-approximation (RPA) approach. In the intermediate interaction region, the ground state is found to be a TSC with the Chern number ±2. In addition, the edge states and the zero modes of the π-flux are discussed. Copyright EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2013