334 citations · 1.4k across the 21 of their papers we have counts for
4 papers · 1 filter
Effective mass at the surface of a Fermi liquid
M. Potthoff, W. Nolting
Using the dynamical mean-field theory, we calculate the effective electron mass in the Hubbard model on a semi-infinite lattice. At the surface the effective mass is strongly enhan…
Surface metal-insulator transition in the Hubbard model
M. Potthoff, W. Nolting
The correlation-driven metal-insulator (Mott) transition at a solid surface is studied within the Hubbard model for a semi-infinite lattice by means of the dynamical mean-field the…
Optimization of alloy-analogy-based approaches to the infinite-dimensional Hubbard model
M. Potthoff, T. Herrmann, W. Nolting
An analytical expression for the self-energy of the infinite-dimensional Hubbard model is proposed that interpolates between different exactly solvable limits. We profit by the com…
Ferromagnetism and Temperature-Driven Reorientation Transition in Thin Itinerant-Electron Films
T. Herrmann, M. Potthoff, W. Nolting
The temperature-driven reorientation transition which, up to now, has been studied by use of Heisenberg-type models only, is investigated within an itinerant-electron model. We con…