Surface & Interface Science Marburg
We do basic experimental research in the field of surface and interface science. Our investigations focus on optical excitations, electron transfer processes and vibrational properties of solid surfaces and internal interfaces. Our main methods are ultrafast laser spectroscopy, time-resolved photoemission, scanning tunnelling microscopy and infrared spectroscopy. Our experiments on well-defined monocrystalline metal and semiconductor samples are usually carried out in ultra-high vacuum. In recent years, the focus has shifted from very simple model systems such as hydrogen on silicon or image-potential states to more complex organic/inorganic interfaces and to surfaces and interfaces of novel materials such as topological insulators or two-dimensional semiconductors. (Introduction for students, in German)
SFB 1083 extended by four more years
The German Research Foundation (Deutsche Forschungsgemeinschaft, DFG) has granted the Collaborative Research Centre SFB 1083 „Structure and Dynamics of Internal Interfaces“ 12.3 Million Euros for a third funding period from July 2021 to June 2025 […]
Turning at top speed – novel light emission from topological surface states
A joint experiment with the group of Rupert Huber in Regensburg demonstrates efficient high-order harmonic generation at the surface of a topological insulator by driving ballistic electron currents at THz frequencies. […]
Imaging molecular orbitals during the ultrafast electron transfer process at interfaces
The charge-transfer dynamics across molecular interfaces is reflected in the population of electronic orbitals. These were, for the first time, directly monitored with ultrafast time resolution by our group in collaboration with the group of Stefan Tautz in Jülich. The experiment excites the molecular LUMO of PTCDA/CuO/Cu(100) with ultrashort visible laser pulses and photoemits the electrons with a time delayed XUV pulse. […]
Surface Dynamics
Prof. Dr. Ulrich Höfer
- Ultrafast dynamics of electronic excitations
- Adsorption on semiconductor surfaces
- Time-resolved two-photon photoemission
Dr. Gerson Mette
- Interface spectroscopy
Dr. Robert Wallauer
- Photoelectron microscopy
Surface Analytics
Prof. Dr. Peter Jakob
- Layered metallic and organic structures
- Infrared vibrational spectroscopy of adsorbates
Schmid et al.,
Nature
May 2021
Tuneable non-integer high-harmonic generation in a topological insulator
Bohamud et al.,
J. Chem. Phys.
March 2021
Adsorption dynamics of bifunctional molecules: Allyl methyl ether on Si(001)
Jakob et al.,
Phys. Rev. Lett.
March 2021
Vibrational frequency used as internal clock reference to access molecule – metal charge transfer times
