Topological superconductors in correlated topological insulators on the honeycomb lattice
Department of Physics, Beijing Normal University, Beijing 100875, P.R. China
Received: 26 May 2013
Received in final form: 20 September 2013
Published online: 13 November 2013
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.
Key words: Solid State and Materials
© EDP Sciences, Società Italiana di Fisica and Springer-Verlag, 2013