Dresden 2020 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 53: Poster Session - Oxides and Insulators: Adsorption and Reaction of Small Molecules

O 53.3: Poster

Dienstag, 17. März 2020, 18:15–20:00, P2/1OG

LEED Analysis of CO on NaCl(100) under Optical Excitation — •Liam Shelling Neto, Hannes Böckmann-Clemens, and Claus Ropers — 4th Physical Institute - Solids and Nanostructures, University of Göttingen, Göttingen, Germany

Vibrational energy transfer between adsorbates and solid surfaces is of fundamental interest in surface science and has been explored in multiple contexts. In this regard, CO adsorbed on NaCl is a prominent model system, as its long vibrational lifetime allows for studying the energy flow between molecules via dipole-dipole interactions, which leads to the extreme concentration of vibrational energy at individual molecules. However, the structural modifications that accompany this process remain largely unknown and challenging to explore, for a lack of a direct probe to observe their dynamics. Here, we use an ultrafast LEED setup to monitor the surface structure under optical excitation. The presented results constitute a preliminary step towards the understanding of the structural dynamics accompanying the vibrational energy transfer.