Metal–insulator transition in the periodic Anderson-Hubbard model in the case of 3-fold degeneracy

The authors suggest a hamiltonian to the Anderson-Habbard three-band periodic model and a properly symmetrized basis of wave functions. According to the Hund's rule and the Polinger's principle of electroneutrality, the researchers have constructed habbard subzones on a symmetric part of this basis through transmitting movement electrons on a lattice and on one of the orbitals. In absence magnetic fields the criterion of transition isolator-metal is received.