ELECTRONIC-STRUCTURE OF COO

The electronic structure of CoO is studied by a self-consistent cluste r-embedding method. The localized and band properties are found in bot h ground state and excited states. An explanation for the insulating n ature of CoO is proposed which is consistent with the one for NiO prop osed previously. The simulations of both the spin-ordered states and t he spin-disordered states (with local antiferromagnetic order) give a good description of the magnetic properties of CoO. It is found theore tically that CoO remains as an insulator when it goes from the paramag netic phase to antiferromagnetic phase.