104 citations · 311 across the 7 of their papers we have counts for
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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…
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…
Competing phases in the extended U-V-J Hubbard model near the van Hove fillings: 2-patch approach
A. P. Kampf, A. A. Katanin
The paper is replaced by the extended version, cond-mat/0212190
Anisotropy of the Energy Gap in the Insulating Phase of the U-t-t' Hubbard Model
Ph. Brune, A. P. Kampf
We apply a diagrammatic expansion method around the atomic limit (U >> t) for the U-t-t' Hubbard model at half filling and finite temperature by means of a continued fraction repre…
Anisotropic Scattering Rates in the t-t'-U Hubbard Model
Joachim Altmann, Wolfram Brenig, Arno P. Kampf
We have investigated the evolution of the electronic properties of the t-t'-U Hubbard model with hole doping and temperature. Due to the shape of the Fermi surface, scattering from…