Figure 4: Theoretical calculations.
From: Ultrafast evolution and transient phases of a prototype out-of-equilibrium Mott–Hubbard material
(a) Hatree–Fock total energy as function of the occupancy difference between 
and a1g orbitals (the total occupancy is 2). (b) DOS for different occupancies of the a1g. (c) Schematic view of the proposed mechanism involved in the photoexcitation of a Mott material, where the a1g states lower in energy both of the PM and PI phases.
