A. E. Antipov, M. S. Aleinikov, V. I. Anisimov, “Role of rotational symmetry in magnetism of multiband models”, Pis'ma v Zh. Èksper. Teoret. Fiz., 2011, Volume 94, Issue 2,Pages <nobr>130

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CONDENSED MATTER

Role of rotational symmetry in magnetism of multiband models

A. E. Antipov^a, M. S. Aleinikov^a, V. I. Anisimov^b

^a M. V. Lomonosov Moscow State University, Faculty of Physics
^b Institute of Metal Physics, Ural Division of the Russian Academy of Sciences

Abstract: The role of the complete Coulomb interaction matrix in the determination of the magnetic susceptibility of the two-band Hubbard model has been investigated in the dynamical mean-field theory. The off-diagonal component of the $U$-matrix has been found to reduce the Nйel temperature, which agrees with the available experimental data. The magnitude of the effect upon a change in the dimension of the $U$-matrix is discussed. The results have been compared with the thermodynamic characteristics of an isolated Hubbard atom.

Received: 25.05.2011