35 citations · 110 across the 8 of their papers we have counts for
4 papers · 1 filter
Realistic theory of electronic correlations in nanoscopic systems
M. Schüler, S. Barthel, T. Wehling +3
Nanostructures with open shell transition metal or molecular constituents host often strong electronic correlations and are highly sensitive to atomistic material details. This tut…
Many-body effects on Cr(001) surfaces: An LDA+DMFT study
M. Schüler, S. Barthel, M. Karolak +5
The electronic structure of the Cr(001) surface with its sharp resonance at the Fermi level is a subject of controversial debate of many experimental and theoretical works. To date…
Effective Heisenberg exchange integrals of diluted magnetic semiconductors determined within realistic multi-band tight-binding models
Stefan Barthel, Gerd Czycholl, Georges Bouzerar
Diluted magnetic semiconductors (DMS) like GaMnAs are described by a realistic tight-binding model (TBM) for the (valence) bands of GaAs, by a Zener (J-)term modeling…
Origins of shortcomings in recent realistic multiband Monte-Carlo studies for GaMnAs
Stefan Barthel, Gerd Czycholl, Georges Bouzerar
Magnetic properties of Mn-doped GaAs are re-investigated within a realistic multiband description of the host valence bands. We explicitely demonstrate that the recent Monte Carlo…