Hamburg 2009 – scientific programme

Parts | Days | Selection | Search | Downloads | Help

MO: Fachverband Molekülphysik

MO 14: Cluster

MO 14.3: Talk

Wednesday, March 4, 2009, 14:45–15:00, VMP 6 HS-F

Valence Electron Localization in 3d⁵ Transition Metal Dimer Cations — •Konstantin Hirsch¹, Andreas Langenberg¹, Fabian Lofink¹, Jürgen Probst¹, Robert Richter¹, Jochen Rittmann¹, Marlene Vogel¹, Vicente Zamudio-Bayer¹, Thomas Möller¹, Bernd von Issendorff², and Tobias Lau¹ — ¹Technische Universität Berlin, Institut für Optik und Atomare Physik, EW 3-1, Hardenbergstrasse 36, D-10623 Berlin, Germany — ²Universität Freiburg, Fakultät für Physik, Stefan-Meier-Strasse 21, D-79104 Freiburg, Germany

By combining an intense magnetron sputter source and an ion trap at a third generation synchrotron radiation source, core level spectroscopy on free, mass selected clusters has been established as an experimental technique. We have investigated mass selected transition metal clusters along the 3d series of the perodic table. Probing the unoccupied density of states by means of X-ray absorption spectroscopy shows that the bonding in theses systems is clearly dominated by the 3d electrons as one would expect. However the d⁵ dimer systems, namely Chromium, Manganese and binary Chromium-Mangenese dimers are a remarkable exception. The bonding mechanism in these systems can directly be deduced from the X-ray absorption spectra and shows a complete localization of the d-electrons at the atomic sites.