Berlin 2018 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 76: Ultrafast Electron and spin dynamics at interfaces III
O 76.3: Vortrag
Mittwoch, 14. März 2018, 18:00–18:15, MA 005
The one-step model of 2PPE in its layer-KKR formulation — •Jürgen Braun and Hubert Ebert — Dept. Chemie, LMU München, Germany
Recently a theoretical frame for the description of two-photon photoemission has been developed by the authors. The approach is based on a general formulation using the Keldysh formalism for the lesser Green function to describe the real-time evolution of the electronic degrees of freedom in the initial state after a pump pulse that drives a system out of equilibrium [1]. The fully relativistic formalism has now been generalized to angular resolution in both the initial and intermediate state by means of layer-KKR multiple scattering techniques. First examples of angular-resolved 2PPE calculations on Fe(100) will be presented. Furthermore, correlation effects will be accounted for in this spectroscopical study by means of a static self-energy ΣDMFT(E) obtained for Fe from dynamical mean-field theory.
[1] J. Braun, R. Rausch, M. Potthoff , and H. Ebert, One-step theory of two-photon photoemission, Phys. Rev. B 94, 125128 (2016)