Peculiarities of the electron spectrum and metal-insulator transition in the strong correlation limit
V. Yu. Irkhin, Alexander V. Zarubin
Green’s function in the paramagnetic phase of the Hubbard model with strong electron correlations is calculated by the many-electron operators method. The density of states pattern is considered in the case of half-filling (metal-insulator transition) and in the doped case. The effect of the low-temperature Kondo scattering on the energy spectrum is analyzed, and the results are compared with the results of the dynamical mean-field theory (DMFT).
Journal of Experimental and Theoretical Physics•May 1, 2013•3 citations