%0 Journal Article
%T Coexistence of Antiferromagnetism and Superconductivity in Iron-Based Superconductors
%A Yasunori Matsui
%A Takao Morinari
%A Takami Tohyama
%J Physics
%D 2014
%I arXiv
%R 10.7566/JPSJ.83.094703
%X We theoretically investigate the coexistence of antiferromagnetism and superconductivity in the iron-based superconductors by using the mean-field theory for two- and three-orbital models. We find that both the s_{+-}-wave and s_{++}-wave superconductivity can coexist with antiferromagnetism in the two models. On Dirac Fermi surfaces emerging in the antiferromagnetic phase, a superconducting-gap function has a node for s_{++} wave but is nodeless for s_{+-} wave. On the other hand, the gap function on non-Dirac Fermi surfaces is either nodeless or accidentally nodal, depending on the parameters of pairing interaction, which is independent of pairing symmetry.
%U http://arxiv.org/abs/1406.5339v2