Juergen Braun

TL;DR: In this paper, the effect of local electronic correlations on the Heusler compounds Co2Mn1−xFexSi as a function of the concentration x has been analyzed by means of first-principles band-structure calculations based on the local approximation to spin-density functional theory (LSDA) and the LSDA + U approach.

TL;DR: In this article, the spin-orbit induced Rashba splitting of Shockley-type surface states is discussed using a fully relativistic description, and the impact of chemical disorder within surface layers can be handled by the coherent potential approximation (CPA) alloy theory.

TL;DR: A semiquantitative model is proposed which permits the first experimental determination by SARPES of this time delay in a dispersive band, which is found to be greater than 26 as for electrons emitted from the sp-bulk band of the model system Cu(111).

TL;DR: In this article, the spin-orbit induced Rashba-splitting of Shockley-type surface states is discussed using a fully relativistic description and the impact of chemical disorder within surface layers can be handled by means of the Coherent Potential Approximation (CPA) alloy theory.

TL;DR: In this article, the spin-orbit-induced electronic band gaps near the Fermi level were investigated and shown to be dominated by the bulk band structure of a prototypical ferromagnet, and it was shown that the observed dispersions are related to changes in the electronic ground state and not caused by the photo emission process itself.