Dresden 2026 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 37: Ultrafast electron dynamics at surface and interfaces – Poster (joint session O/TT)
TT 37.13: Poster
Tuesday, March 10, 2026, 14:00–16:00, P2
Probing Ultrafast Structural Dynamics in Multilayer Graphene Using ULEEM — •Simon Briesenick1,2,4, Johannes Otto1,2,4, Leon Brauns1,2, Philip Schädlich3, and Claus Ropers1,2 — 1Department of Ultrafast Dynamics, Max Planck Institute for Multidisciplinary Sciences, Göttingen, Germany — 24th Physical Institute, University of Göttingen, Göttingen, Germany — 3Institute of Physics, TU Chemnitz, Chemnitz, Germany — 4authors contributed equally
Multilayers of graphene (MLG) exhibit electronic and structural properties that vary strongly with, e.g., layer number and stacking order, making MLG a suitable model platform for studying ultrafast phenomena in two-dimensional materials [1]. We investigate the behavior of MLG after excitation with ultrashort light pulses using our newly developed ultrafast low-energy electron microscope (ULEEM) [2]. The instrument allows for the investigation of surface structural dynamics with sub-picosecond and nanometer spatial resolution, utilizing low-energy (≤ 100 eV) ultrashort probe electron pulses. We present first data on the light-induced Debye-Waller effect in MLG, demonstrating the potential of ULEEM studies for resolving ultrafast structural behavior in MLG.
[1] K. V. Emtsev, et al. Phys Rev B. 77, 155303 (2008) [2] J. Otto et al. (in preparation)
Keywords: light-matter Interaction; uleem; two-dimensional materials; epitaxial graphene; surface dynamics