51 citations · 344 across the 17 of their papers we have counts for
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Orbital polaron in double exchange ferromagnets
T. L. Van den Berg, P. Lombardo, R. O. Kuzian +1
We investigate the spectral properties of the two-orbital Hubbard model, including the double hopping term, by means of the dynamical mean field method. This Hamiltonian describes…
Electronic phase transitions in the half-filled ionic Hubbard model
L. Craco, P. Lombardo, R. Hayn +2
A detailed study of electronic phase transitions in the ionic Hubbard model at half filling is presented. Within the dynamical mean field approximation a series of transitions from…
Band-Insulator-Metal-Mott-Insulator transition in the half--filled ionic-Hubbard chain
G. I. Japaridze, R. Hayn, P. Lombardo +1
We investigate the ground state phase diagram of the half-filled repulsive Hubbard model in the presence of a staggered ionic potential , using the continuum-limi…
Spectral density of the Hubbard-model by the continued fraction method
R. Hayn, P. Lombardo, K. Matho
We present the continued fraction method (CFM) as a new microscopic approximation to the spectral density of the Hubbard model in the correlated metal phase away from half filling.…
Insulator-metal-insulator transition and selective spectral weight transfer in a disordered strongly correlated system
P. Lombardo, R. Hayn, G. I. Japaridze
We investigate the metal insulator transitions at finite temperature for the Hubbard model with diagonal alloy disorder. We solve the dynamical mean field theory equations with the…
Effect of Hund's exchange on the spectral function of a triply orbital degenerate correlated metal
P. Lombardo, A. - M. Daré, R. Hayn
We present an approach based on the dynamical mean field theory which is able to give the excitation spectrum of a triply degenerate Hubbard model with a Hund's exchange invariant…