22 citations · 22 across the 4 of their papers we have counts for
4 papers
The 2-site Hubbard and t-J models
Adolfo Avella, Ferdinando Mancini, Taiichiro Saikawa
The fermionic and bosonic sectors of the 2-site Hubbard model have been exactly solved by means of the equation of motion and Green's function formalism. The exact solution of the…
Remnant Fermi surface in a pseudogap regime of the two-dimensional Hubbard model at finite temperature
Taiichiro Saikawa, Alvaro Ferraz
A precursor effect on the Fermi surface in the two-dimensional Hubbard model at finite temperatures near the antiferromagnetic instability is studied using three different itineran…
Anisotropic pseudogap in the half-filling 2-d Hubbard model at finite T
T. Saikawa, A. Ferraz
We have studied the pseudogap formation in the single-particle spectra of the half-filling two-dimensional Hubbard model. Using a Green's function with the one-loop self-energy cor…
Non-Fermi Liquid Behaviour in d = 2 Spatial Dimension
A. Ferraz, S. L. Garavelli, T. Saikawa
We consider a local effective model for fermionic low lying excitations in a metal. Introducing a boson auxiliary field and taking into account that the most significant interactio…