Berlin 2012 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

O: Fachverband Oberflächenphysik

O 8: Electron and spin dynamics

O 8.10: Vortrag

Montag, 26. März 2012, 12:45–13:00, A 060

Hot carrier relaxation in HOPG probed at the H-point by means of time-resolved XUV photoemission — •Ankatrin Stange, Christian Sohrt, Timm Rohwer, Stefan Hellmann, Gerald Rohde, Kerstin Hanff, Lutz Kipp, Kai Rossnagel, and Michael Bauer — Institut für Experimentelle und Angewandte Physik, Universität Kiel, 24118 Kiel, Germany

Time- and angle-resolved XUV photoelectron spectroscopy (tr-ARPES) is applied to study the relaxation dynamics of excited hot carriers in HOPG and graphene. The XUV probe used in the experiment allows us to record electronic structure transients at large momentum values so that in particular the boundary of the first Brillouin zone becomes accessible. In the case of HOPG this capability provides a most direct access to the momentum region relevant for optical excitation and subsequent relaxation of the hot carriers. The results are discussed with respect to other time-resolved experiments which in the past were restricted to probes in the visible/NUV regime.