Figure 8
An Eg(Q2, Q3) radial plot comparing the pressure dependence of the MO6 (M = Ni, Cu) octahedra for KCuF3 and NaNiO2 between 0 and 5 GPa, where ρ0 is normalized to the value at the lowest measured pressure and the dashed lines represent the average ϕ for each material within this pressure range. |