The nature of the couplings within and between lattice and charge degrees of freedom is central our understanding of material properties. These interactions are essential to phenomena as diverse as thermoelectricity, superconductivity, charge density waves, and carrier and phonon transport. Despite their fundamental role in a broad range of processes, detailed momentum-dependent information on...
Ultrafast X-ray crystallography has emerged as a powerful technique to resolve electron density dynamics on femtosecond time scale in molecular crystals, using X-ray Free Electron Lasers. However, a multitude of ultrafast phenomena, in particular optical non-linear processes, remain to be fully established for this application. There are multiple avenues to combine the techniques of optical...
Understanding photoinduced chemical reactions at the electronic, atomic and molecular scales and on relevant timescales is critical for controlling reaction pathways, rates and efficiency. This fundamental knowledge is essential for applications such as catalysis, photoswitching, and light-harvesting. X-ray free-electron lasers (XFELs) produce intense and ultrashort x-ray pulses, allowing to...
