The relatively simple
structure of metal surfaces are a well-suited model system for basic
studies like the connection of RAS to the electrical and optical
properties of surfaces. Until now three major contributions to Reflectance Anisotropy Spectroscopy (RAS)
could be found and separated:
- electronic transitions between localized surface states and resonances
- transitions between near surface bulk bands
- surface plasmons
To measure these
properties the measurements in the lab are combined by Photoemission
using the synchrotron radiation of several international electron
storage rings, especially with University of Aarhus, Denmark. These
experimental results are compared with Density Functional Theory
(DFT) calculations performed at the University of Toronto (Canada)
The magnetic properties of
Cobalt covered Copper and related surfaces are studied together with
collaborating groups of the Special Research Center "Thin Metal
Films" (SfB 290) at the Free University. Especially the
technique of Reflectance Anisotropy Spectroscopy and Magneto-optical
Kerr-Spectroscopy (MOKE) will be applied at this system.
Magnetic measurement by MOKE during Ni growth on a Cu(110) (2x1)-O reconstructed surface (Background: STM image after 12 ML Ni deposition).
Contact:
- Wolfgang Richter (General Coordination)
- Theo Herrmann (MOKE, properties of magnetic layers)
Collaboration:
