Panel a: steady-state accretion layers, as a function of location in the disk, for the fiducial model. The black colored area corresponds to the dead zone. The gray colored area corresponds to the zombie zone. The red and black hatched area corresponds to the MRI-active layer. The region within the dash-dotted magenta lines defines where the ambipolar condition (β > β_min) is satisfied in the disk, while the region above the dashed cyan line defines where the Ohmic condition (Λ > 1) is fulfilled. The region above the solid green line corresponds to where β > 1. The dashed white lines correspond to the surfaces z = 1 H_gas, z = 2 H_gas, z = 3 H_gas, and z = 4 H_gas, from bottom to top, respectively. Panel b: Regimes of the nonideal MHD effects by showing the dominant magnetic diffusivities as a function of location in the disk. In the orange colored region the Ohmic resistivity dominates (η_O is the highest magnetic diffusivity), in the gray and blue colored regions the Hall effect dominates (|η_H | is the highest magnetic diffusivity), and in the green colored regions ambipolar diffusion dominates (η_AD is the highest magnetic diffusivity). The MRI-active layer is shown by the black hatched area. The dashed white lines are the same as in panel a.