171 citations · 177 across the 2 of their papers we have counts for
7 papers · 1 filter
Mott transition in one dimension: Benchmarking dynamical cluster approaches
Matthias Balzer, Werner Hanke, Michael Potthoff
The variational cluster approach (VCA) is applied to the one-dimensional Hubbard model at zero temperature using clusters (chains) of up to ten sites with full diagonalization and…
Phase separation and competition of superconductivity and magnetism in the two-dimensional Hubbard model: From strong to weak coupling
M. Aichhorn, E. Arrigoni, M. Potthoff +1
Cooperation and competition between the antiferromagnetic, d-wave superconducting and Mott-insulating states are explored for the two-dimensional Hubbard model including nearest an…
Non-perturbative construction of the Luttinger-Ward functional
Michael Potthoff
For a system of correlated electrons, the Luttinger-Ward functional provides a link between static thermodynamic quantities on the one hand and single-particle excitations on the o…
Self-energy-functional approach: Analytical results and the Mott-Hubbard transition
M. Potthoff
The self-energy-functional approach proposed recently is applied to the single-band Hubbard model at half-filling to study the Mott-Hubbard metal-insulator transition within the mo…
Theory of electron spectroscopies
M. Potthoff
The basic theory of photoemission, inverse photoemission, Auger-electron and appearance-potential spectroscopy is developed within a unified framework starting from Fermi's golden…
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…