35 citations · 110 across the 8 of their papers we have counts for
8 papers
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…
Electronic Transport in Graphene with Aggregated Hydrogen Adatoms
Fernando Gargiulo, Gabriel Autès, Naunidh Virk +5
Hydrogen adatoms and other species covalently bound to graphene act as resonant scattering centers affecting the electronic transport properties and inducing Anderson localization.…
Determination of the Fermi Level Position in Dilute Magnetic GaMnN Films
Stefan Barthel, Gerd Kunert, Mariuca Gartner +6
We report on a combined theoretical and experimental determination of the Fermi level position in wurtzite GaMnN films with and as grown by molecular…
Quantum-Confined Stark Effect in polar and nonpolar Wurtzite InN/GaN Heterostructures: Influence on Electronic Structure and Compensation by Coulomb Attraction
Stefan Barthel, Kolja Schuh, Oliver Marquardt +4
In this paper we systematically analyze the electronic structures of polar and nonpolar wurtzite-InN/GaN quantum dots and their modification due to the quantum-confined Stark effec…
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…
Multiband effective bond-orbital model for nitride semiconductors with wurtzite structure
Daniel Mourad, Stefan Barthel, Gerd Czycholl
A multiband empirical tight-binding model for group-III-nitride semiconductors with a wurtzite structure has been developed and applied to both bulk systems and embedded quantum do…