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Incommensurate magnetic order and phase separation in the two-dimensional Hubbard model with nearest and next-nearest neighbor hopping
P. A. Igoshev, M. A. Timirgazin, A. A. Katanin +2
We consider the ground state magnetic phase diagram of the two-dimensional Hubbard model with nearest and next-nearest neighbor hopping in terms of electronic density and interacti…
The Neel temperature and sublattice magnetization for the stacked triangular-lattice antiferromagnet with a weak interlayer coupling
A. N. Ignatenko, V. Yu. Irkhin, A. A. Katanin
The quantum Heisenberg antiferromagnet on the stacked triangular lattice with the intralayer nearest-neighbor exchange interaction J and interlayer exchange J' is considered within…
Orbital selective local moment formation in iron: first principle route to an effective model
A. A. Katanin, A. I. Poteryaev, A. V. Efremov +4
We revisit a problem of theoretical description of alpha-iron. By performing LDA+DMFT calculations in the paramagnetic phase we find that Coulomb interaction and, in particular Hun…
The quantum critical behavior of antiferromagnetic itinerant systems with van Hove singularities of electronic spectrum
A. Katanin
The interplay of magnetic and superconducting fluctuations in two dimensional systems with van Hove singularities in the electronic spectrum is considered within the functional ren…