76 citations · 147 across the 3 of their papers we have counts for
3 papers
cond-mat.str-el2003★ 76 cited
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-el2000★ 64 cited
η-superconductivity in the Hubbard chain with pair hopping
G. I. Japaridze, A. P. Kampf, M. Sekania +2
The ground state phase diagram of the 1D Hubbard chain with pair-hopping interaction is studied. The analysis of the model is performed using the continuum-limit field theory appro…
cond-mat.str-el2000★ 7 cited
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…