If you share our enthusiasm about ultrafast phenomena in condensed matter and look for an interesting research project as postoc or in the context of a Master’s or PhD program, please contact us.
Currently, there are open positions for PhD students and postdocs within the ERC-funded research project ‘FLATLAND: Electron-lattice-spin correlations and many-body phenomena in 2D semiconductors and related heterostructures‘.
This experimental project is based on a set of ultrafast techniques, including femtosecond electron diffraction, XUV-based time- and angle-resolved photoelectron spectroscopy (trARPES), and low-energy electron diffraction and imaging. Specifically:
PhD or Master project: Development of femtosecond electron holography and Visualization of photocurrents in nanoobjects.
We developed femtosecond point-projection microscopy as an ultrafast microscopy technique for the investigation of carrier motion in nanoobjects. Conceptually, our experimental scheme is very similar to the first implementation of in-line holography presented by Dennis Gabor in 1948. The aim of this project is the implementation of femtosecond electron in-line holography and its use for filming charge carrier motion in 2D materials and molecular systems.
PhD project: Excited state mapping and dynamics in semiconducting transition metal dichalcogenides investigated with time- and angle-resolved photoelectron spectroscopy
We developed a 0.5 MHz femtosecond XUV laser in combination with time- and angle-resolved photoelectron spectroscopy. This experimental methods allows us to map the electronic structure of a crystalline material with energy, momentum and time resolution. In particular, we can map the electronic structure in the entire Brillouin zone, but not only of the occupied states: now, we can also take snapshots of the energy- and momentum-distribution of excited states shortly after excitation with a femtosecond laser pulse. The aim of this project is the investigation of the structure and dynamics of excited electronic states in semiconductor heterostructures.
Contact: Ralph Ernstorfer
PhD project: Ultrafast dynamics in atomic wire systems
This research project is embedded in the research unit Metallic nanowires on the atomic scale: Electronic and vibrational coupling in real world systems (FOR 1700) funded by the German Science Foundation (DFG). The specific goal of sub-project E5 is the investigation of phase transitions and electron dynamics in quasi-1D metallic wires on semiconductor surfaces. More information is available on the E5 project page.