Figure 1
(a) Illustration of the geometry and the angles. (b) Energy diagram for the 1A1g(Oh) ground state and the 5B2g(D4h) ground state. (c) The 5B2g(D4h) state is the split subgroup of the 5T2g(Oh) state in the tetragonal distortion (in-plane tensile strained) (Wang et al., 2019). |