Figure 1

(Color online) Top: The Fermi surface of the two-orbital model on the large one Fe per cell BZ at $\mu =1.00$, $\mu =1.45$, and $\mu =2.00$ from left to right. The dashed square indicates the BZ of two Fe per cell. Bottom: The Fermi surface folded into the two Fe per cell BZ at $\mu =1.00$, $\mu =1.45$, and $\mu =2.00$ from left to right. Here the hopping integrals of the tight-binding model are set as $t_1=-1$, $t_2=1.3$, and $t_3=t_4=0.85$, which are shown in Fig. 2. In this case, $\mu =1.45$ for the middle two figures corresponds to half-filling. The leftmost two figures correspond to hole doping, and Fermi surfaces (red lines) reside around $\Gamma$ point. Upon doping, the hole Fermi surfaces shrink, while the electron Fermi surfaces around $M$ point (green lines) expand.Reuse & Permissions

Figure 2

(Color online) The schematic illustration for the hopping parameters of the two-orbital $d_{xz},d_{yz}$ model on a square lattice. The projections of the $d_{xz}$ $\left(d_{yz}\right)$ orbitals onto the $xy$ plane are depicted in red (green). Here $t_1$ represents the nearest-neighbor hopping integral between $\sigma$ orbitals and $t_2$ the nearest-neighbor hopping integral between $\pi$ orbitals; $t_3$ denotes next-nearest-neighbor hopping between similar orbitals and $t_4$ the next-nearest-neighbor hopping integral between different orbitals.Reuse & Permissions

Figure 3

(Color online) The pair coordinates $\vec{\delta }$ used to define ${\Delta }_{\vec{\delta }}$, the range over five positions including (0,0).Reuse & Permissions