Eur. Phys. J. B (2013) 86: 466
https://doi.org/10.1140/epjb/e2013-40521-5

Regular Article

Topological superconductors in correlated topological insulators on the honeycomb lattice

Department of Physics, Beijing Normal University, Beijing 100875, P.R. China

^a e-mail: spkou@bnu.edu.cn

Received: 26 May 2013
Received in final form: 20 September 2013
Published online: 13 November 2013

Abstract

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.