137 citations · 772 across the 20 of their papers we have counts for
20 papers
Singular Dynamics of Underscreened Magnetic Impurity Models
Winfried Koller, Alex C. Hewson, Dietrich Meyer
We give a comprehensive analysis of the singular dynamics and of the low-energy fixed point of one-channel impurity s-d models with ferromagnetic and underscreened antiferromagneti…
Phase diagram and dynamic response functions of the Holstein-Hubbard model
W. Koller, D. Meyer, A. C. Hewson +1
We present the phase diagram and dynamical correlation functions for the Holstein-Hubbard model at half filling and at zero temperature. The calculations are based on the Dynamical…
Dynamic response functions for the Holstein-Hubbard model
W. Koller, D. Meyer, A. C. Hewson
We present results on the dynamical correlation functions of the particle-hole symmetric Holstein-Hubbard model at zero temperature, calculated using the dynamical mean field theor…
Renormalized Parameters for Impurity Models
A. C. Hewson, A. Oguri, D. Meyer
We show that the low energy behaviour of quite diverse impurity systems can be described by a single renormalized Anderson model, with three parameters, an effective level $\tildeε…
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…
Self-energy approach to the correlated Kondo-lattice model
W. Nolting, G. G. Reddy, A. Ramakanth +2
We develop an interpolating self-energy approach to the correlated Kondo-lattice model. The correlation of the band electrons is taken into account by a Hubbard interaction. The me…