7 papers
Asymmetric electron-phonon interactions in the three-band Peierls-Hubbard model
Z. B. Huang, W. Hanke, E. Arrigoni
Using the Quantum Monte Carlo (QMC) technique within frozen-phonon, we studied the effects of the half-breathing O phonon mode on the ground-state properties of the three-ba…
Interrelation between antiferromagnetic and superconducting gaps in high-Tc materials
E. Arrigoni, M. G. Zacher, T. Eckl +1
We propose a phenomenological model, comprising a microscopic \sof model plus the on-site Hubbard interaction (``projected \sof model'') to understand the interrelation between…
Screening of long-range Coulomb interactions in the quasi two-dimensional extended Hubbard model: A combined quantum Monte Carlo and Feynman diagram study
H. -B. Schüttler, C. Gröber, H. G. Evertz +1
By combining fermion Quantum Monte Carlo (QMC) simulations with diagrammatic theory, we have calculated the dielectric screening and the screened potential, in a quasi 2D Hubbard m…
Dynamical properties of two doped, coupled Hubbard chains
R. M. Noack, M. G. Zacher, H. Endres +1
Using quantum Monte Carlo (QMC) simulations combined with Maximum Entropy analytic continuation as well as analytical methods, we examine the one- and two-particle dynamical proper…
Overscreening in Hubbard electron systems
H. -B. Schüttler, C. Gröber, H. G. Evertz +1
We show that doping-induced charge fluctuations in strongly correlated Hubbard electron systems near the 1/2-filled, insulating limit cause overscreening of the electron-electron C…
Transport Properties of One-Dimensional Hubbard Models
S. Kirchner, H. G. Evertz, W. Hanke
We present results for the zero and finite temperature Drude weight D(T) and for the Meissner fraction of the attractive and the repulsive Hubbard model, as well as for the model w…