171 citations · 177 across the 2 of their papers we have counts for
5 papers
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…
Effects of Core-Hole Screening on Spin-Polarised Auger Spectra from Ferromagnetic Nickel
T. Wegner, M. Potthoff, W. Nolting
We calculate the spin- and temperature-dependent local density of states for ferromagnetic Ni in the presence of a core hole at a distinguished site in the lattice. Correlations am…