In this paper, we realize a topological superconductor (TSC) in correlated topological insulator - the interacting spinful Haldane model. We consider the electrons on the Haldane model with on-site negative-U interaction and then study its properties by mean field theory and random-phase-approximation (RPA) approach. We found that in the intermediate interaction region, the ground state becomes a TSC with the Chern number 2. We also study its edge states and the zero modes of the pi-flux.
@article{arxiv.1305.1294,
title = {Topological Superconductors in Correlated Chern Insulators},
author = {Ying Liang and Jing He and Ya-Jie Wu and Ying-Xue Zhu and Su-Peng Kou},
journal= {arXiv preprint arXiv:1305.1294},
year = {2013}
}