Effects of Attractive correlation on Topological Flat-bands Model
Strongly Correlated Electrons
2015-04-10 v1
Abstract
In this paper, we study the effects of attractive correlation on the topological insulator () with topological flat-bands using an extended attractive Kane-Mele-Hubbard model (KMHM). In the KMHM, we found a quantum phase transition from to the superconductor () state upon the increasing of the attractive Hubbard interaction at the mean field level. This type of phase transition is different from the traditional phase transition which develops from the gapless Fermi Liquid. Cooperon-type gapped excitations exist in the side near this type of phase transition.
Keywords
Cite
@article{arxiv.1504.02296,
title = {Effects of Attractive correlation on Topological Flat-bands Model},
author = {Chun-Li Zang and Jing He and Ya-Jie Wu},
journal= {arXiv preprint arXiv:1504.02296},
year = {2015}
}