5 papers
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…
Interrelation of Superconducting and Antiferromagnetic Gaps in High-Tc Compounds: a Test Case for a Microscopic Theory
Werner Hanke, Marc G. Zacher, Enrico Arrigoni +1
Recent angle resolved photoemission (ARPES) data, which found evidence for a d-wave-like modulation of the antiferromagnetic gap, suggest an intimate interrelation between the anti…
Hubbard Fermi surface in the doped paramagnetic insulator
C. Groeber, M. G. Zacher, R. Eder
We study the electronic structure of the doped paramagnetic insulator by finite temperature Quantum Monte-Carlo simulations for the 2D Hubbard model. Throughout we use the moderate…
Paramagnetic metal-insulator transition in the 2D Hubbard model
C. Groeber, M. G. Zacher, R. Eder
We study the transition from paramagnetic metal to paramagnetic insulator by finite temperature Quantum Monte-Carlo simulations for the 2D Hubbard model at half-filling. Working at…
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…