METAL-DIELECTRIC TRANSITION IN PERIODIC ANDERSON-HUBBARD MODEL
IN CASE OF THREE-FOLD DEGENERATION

Shilov Vladimir Egorovich, Candidate of physical and mathematical sciences, associate professor, sub-department of general physics,Mari State University (Yoshkar Ola), crabflo@mail.ru
Shilova Elena Vladimirovna, Candidate of physical and mathematical sciences, associate professor, sub-department of general physics, Mari State University (Yoshkar Ola), crabflo@mail.ru

538.1; 539.213

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.

electroresistance, electronic correlations, effective weight, spin wave, time of relaxation.