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Struktur und Dynamik Poster: Mi., 14:00–16:30 M-P130
Resonant X-ray spectroscopy for atom specific electronic structure and dynamics
Alexander Föhlisch 1 , Mitsuru Nagasono 1 , Sethuraman Vijayalakshmi 1 ,
Franz Hennies 1 , Edlira Suljoti 1 , Annette Pietzsch 1 , Wilfried Wurth 1
1 Institut für Experimentalphysik, Universität Hamburg, Luruper Chaussee 149, 22761
Hamburg
In complex systems, composed from many atomic units, it is of equal importance to
determine the time scales of dynamic processes and to have control at which atomic
site a dynamic process was initiated. Using third generation synchrotron radiation
facilities, resonant X-ray spectroscopy allows to create atomically localized excited
states and to monitor their dynamics in comparison to the ultra fast time scale of the
transient core-hole resonance in autoionization or resonant inelastic X-ray scattering.
With this core-hole-clock method, charge transfer between adsorbed atoms and the
substrate has been investigated. Monitoring Coster-Kronig decay channels, charge
transfer dynamics of only 320±90 attoseconds could be determined for Sulphur adsorbed
on the Ru(0001) surface extending the core-hole-clock method into the range of
attoseconds. The influence of orbital overlap and the surface electronic structure of the
substrate has also been studied and fundamental aspects of autoionization and the electron
localization in matter have been performed. Due to the symmetry selection rules
of resonant inelastic X-ray scattering, ultra fast atomic motion can be investigated,
which changes the molecular symmetry during the transient core-excited state.