The full electronic Hamiltonian for the twoorbital model was derived and discussed earlier. Here we present schematically all physical processes which are involved in this Hamiltonian in Fig. . In the figure ϵ a denotes a single-particle energy of the electron in an atomic state and it is shown as an isolated electron with spin. The second microscopic parameter: hopping amplitude t represents electron hopping between two neighboring atoms. It is represented schematically in the Fig. The exchange integral J is shown in the figure a green arrows forming loops between two atoms occupied by two electrons with opposite spins suggesting the interaction involving an exchange of spin orientation. V is the so-called correlated hopping marked as a purple arrow from one atom to its neighbor indicating the hopping of an electron pair.