52 citations · 88 across the 2 of their papers we have counts for
4 papers
Optical absorption of strongly correlated half-filled Mott-Hubbard chains
F. Gebhard, K. Bott, M. Scheidler +2
In this last of three articles on the optical absorption of electrons in a half-filled Peierls-distorted chain we address the dimerized extended Hubbard model in the limit of a lar…
Exact results for the optical absorption of strongly correlated electrons in a half-filled Peierls-distorted chain
F. Gebhard, K. Bott, M. Scheidler +2
In this second of three articles on the optical absorption of electrons in a half-filled Peierls-distorted chain we present exact results for strongly correlated tight-binding elec…
Asymptotic Bethe-Ansatz results for a Hubbard Chain with 1/sinh-Hopping
F. Gebhard, P. -A. Bares
We investigate spin-1/2 electrons with local Hubbard interaction and variable range hopping amplitudes which decay like~. Assuming integrability the Asymptotic…
Charge and Spin Gap Formation in Exactly Solvable Hubbard Chains with Long-Rang Hopping
F. Gebhard, A. Girndt, A. E. Ruckenstein
We discuss the transition from a metal to charge or spin insulating phases characterized by the opening of a gap in the charge or spin excitation spectra, respectively. These trans…