SurfaceScience21 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 41: Poster Session III: Poster to Mini-Symposium: Ultrafast surface dynamics at the space-time limit I
O 41.4: Poster
Dienstag, 2. März 2021, 10:30–12:30, P
Direct Access to Auger Recombination in Graphene — •Marius Keunecke1, David Schmitt1, Marcel Reutzel1, Marius Weber2, Christina Möller1, G. S. Matthijs Jansen1, Tridev A. Mishra3, Alexander Osterkorn3, Wiebke Bennecke1, Klaus Pierz4, Hans Werner Schumacher4, Davood Momeni Pakdehi4, Daniel Steil1, Salvatore R. Manmana3, Sabine Steil1, Stefan Kehrein3, Hans Christian Schneider2, and Stefan Mathias1 — 11. Physikalisches Institut, Georg-August-Universität Göttingen, Göttingen, Germany — 2TU Kaiserslautern, Kaiserslautern, Germany — 3Institut für Theoretische Physik, Georg-August-Universität Göttingen, Göttingen, Germany — 4Physikalisch-Technische Bundesanstalt, Braunschweig, Germany
The Auger scattering channels are of fundamental importance in the non-thermal charge-carrier dynamics of graphene and govern processes of technological relevance like carrier-multiplication and population inversion. These band-crossing scattering events can be separated into impact excitation (IE) and Auger recombination (AR) events which increase (IE) or decrease (AR) the charge-carriers in the conduction band. In this contribution, we apply time-resolved momentum-microscopy to study the non-thermal charge carrier dynamics in n-doped graphene with energy and full in-plane momentum resolution. We report on direct experimental evidence and quantification of AR in graphene and support our conclusions by model calculations.