86 citations · 123 across the 5 of their papers we have counts for
5 papers
Ferromagnetic Polarons, Phase Separation, Stripes and Polaron Lattice: The two- and three-dimensional ferromagnetic Kondo Model
M. Daghofer, W. Koller, H. G. Evertz +1
We investigate the two- and three-dimensional ferromagnetic Kondo lattice model by unbiased Monte Carlo simulations. A phase diagram for the two-dimensional model is presented, in…
Single particle spectrum of the flux phase in the FM Kondo Model
M. Daghofer, W. Koller, W. von der Linden +1
We investigate the 2D ferromagnetic Kondo lattice model for manganites with classical corespins at Hund's rule coupling J_H=6, with antiferromagnetic superexchange 0.03 < J' < 0.05…
First- and Second Order Phase Transitions in the Holstein-Hubbard Model
W. Koller, D. Meyer, Y. Ono +1
We investigate metal-insulator transitions in the Holstein-Hubbard model as a function of the on-site electron-electron interaction U and the electron-phonon coupling g. We use sev…
Uniform hopping approach to the FM Kondo Model at finite temperature
Winfried Koller, Alexander Pruell, Hans Gerd Evertz +1
We study the ferromagnetic Kondo model with classical corespins via unbiased Monte-Carlo simulations and derive a simplified model for the treatment of the corespins at any tempera…
Effective spinless fermions in the strong coupling Kondo model
Winfried Koller, Alexander Pruell, Hans Gerd Evertz +1
Starting from the two-orbital Kondo-lattice model with classical t_2g spins, an effective spinless fermion model is derived for strong Hund coupling J_H with a projection technique…