During molecular dissociation in the presence of an external uniform magnetic field, electrons flip their spin anti-parallel to the magnetic field due to the stabilizing influence of the spin Zeeman operator. Although generalized Hartree-Fock (GHF) descriptions furnish the optimal mean-field energetic description of such bond breaking processes as they are allowed to break Sz-symmetry, they can lead to intricate and unexpected spin phase transitions. In this research branch, we aim to get more insight into the chemical origin of those phase transitions.
