Phase diagram of doped BaFe${}_2$As${}_2$ superconductor under broken $C_4$ symmetry

Yuan-Yen Tai, Jian-Xin Zhu, Matthias J. Graf +1

We develop a minimal multiorbital tight-binding model with realistic hopping parameters. The model breaks the symmetry of the tetragonal point group by lowering it from $C_4$ to $D…