| Function and dynamics in complex matter is often governed by disperse active sites, long range interactions and a large number of coupled degrees of freedom. X-ray spectroscopic tools give us access to the electronic structure, the chemical state and the magnetic properties on the level of the atomic building blocks. In particular molecular dynamics and charge transfer dynamics can be probed on the attosecond and femtosecond time scale using the core hole clock method. Using high brillance femtosecond X-ray pulses X-ray spectroscopy becomes a pump-probe experimental technique to excite and follow wave packet dynamics in complex matter on the atomic scale. Here issues like cross-correlation and the different variants of time resolved X-ray spectroscopy will be treated. |
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