74 citations · 216 across the 9 of their papers we have counts for
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Ferromagnetism in the Hubbard model
W. Nolting, M. Potthoff, T. Herrmann +1
We investigate the possibility and stability of bandferromagnetism in the single-band Hubbard model. This model poses a highly non-trivial many-body problem the general solution of…
On the magnetic stability at the surface in strongly correlated electron systems
T. Herrmann, W. Nolting
The stability of ferromagnetism at the surface at finite temperatures is investigated within the strongly correlated Hubbard model on a semi-infinite lattice. Due to the reduced su…
Influence of uncorrelated overlayers on the magnetism in thin itinerant-electron films
J. H. Wu, T. Herrmann, W. Nolting
The influence of uncorrelated (nonmagnetic) overlayers on the magnetic properties of thin itinerant-electron films is investigated within the single-band Hubbard model. The Coulomb…
Ferromagnetism and the temperature-dependent electronic structure in thin Hubbard films
T. Herrmann, W. Nolting
The magnetic behavior of thin ferromagnetic itinerant-electron films is investigated within the strongly correlated single-band Hubbard model. For its approximate solution we apply…
The moment sum rule and its consequences for ferromagnetism in the Hubbard model
M. Potthoff, T. Herrmann, T. Wegner +1
The sum rule for the moments of the spectral density is discussed for the single-band Hubbard model. It is shown that respecting the sum rule up to the order m=3 is conceptually im…
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…