Time-reversal symmetry breaking superconductivity in the coexistence phase with magnetism in Fe-pnictides

Alberto Hinojosa, Rafael M. Fernandes, Andrey V. Chubukov

We argue that superconductivity in the coexistence region with spin-density-wave (SDW) order in weakly doped Fe-pnictides differs qualitatively from the ordinary $s^{+-}$ state out…