447 citations · 3.8k across the 103 of their papers we have counts for
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Robustness of the van Hove scenario for high-Tc superconductors
V. Yu. Irkhin, A. A. Katanin, M. I. Katsnelson
The pinning of the Fermi level to the van Hove singularity and the formation of flat bands in the two-dimensional t-t' Hubbard model is investigated by the renormalization group te…
Calculation of Neel temperature for S=1/2 quasi-one-dimensional Heisenberg antiferromagnets
V. Yu. Irkhin, A. A. Katanin
Isotropic S=1/2 quasi-one-dimensional antiferromagnets are considered within the bosonization method. The 1/zp-corrections to the interchain mean-field theory (zp is the number of…
Orientational phase transitions in anisotropic rare-earth magnets at low temperatures
V. Yu. Irkhin, A. A. Katanin
Orientational phase transitions are investigated within the Heisenberg model with single-site anisotropy. The temperature dependence of the cone angle is calculated within the spin…
The Kosterlitz-Thouless and magnetic transition temperatures in layered magnets with a weak easy-plane anisotropy
V. Yu. Irkhin, A. A. Katanin
The two-dimensional (2D) Heisenberg magnet with a weak easy-plane anisotropy is considered. A renormalization group (RG) analysis in this model is performed for both quantum and cl…
Quantum phase transitions and thermodynamic properties in highly anisotropic magnets
V. Yu. Irkhin, A. A. Katanin
The systems exhibiting quantum phase transitions (QPT) are investigated within the Ising model in the transverse field and Heisenberg model with easy-plane single-site anisotropy.…
Thermodynamics of isotropic and anisotropic layered magnets: renormalization group approach and 1/N expansion
V. Yu. Irkhin, A. A. Katanin
The O(N) model of layered antiferro- and ferromagnets with a weak interlayer coupling and/or easy-axis anisotropy is considered. A renormalization group (RG) analysis in this model…