2 papers
cond-mat.str-el2003
Nature of the insulating phases in the half-filled ionic Hubbard model
A. P. Kampf, M. Sekania, G. I. Japaridze +1
We investigate the ground-state phase diagram of the one-dimensional "ionic" Hubbard model with an alternating periodic potential at half-filling by numerical diagonalization of fi…
cond-mat.str-el2002
Competing phases in the extended U-V-J Hubbard model near the van Hove fillings
A. P. Kampf, A. A. Katanin
The phase diagram of the two-dimensional extended one-band U-V-J Hubbard model is considered within a mean-field approximation and two- and many-patch renormalization group (RG) ap…