Speaker
Stefan Hellmann
(University of Kiel, Germany)
Description
The combination of time-resolved core-level photoemission spectroscopy using the free-electron laser FLASH and time- and angle-resolved photoemission spectroscopy with a table-top higher-harmonics-generation source opens the way to study the nonequilibrium dynamics of condensed matter systems with full momentum, elemental, chemical, and atomic-site selectivity. We present our experimental approaches and discuss important technical challenges at these light sources such as vacuum space-charge effects and synchronization issues. We show recent results of the atomic-site and momentum specific charge-order dynamics of the Mott insulator 1T-TaS2 and the Peierls insulator RbxTaS2.
Author
Stefan Hellmann
(University of Kiel, Germany)
Co-authors
Kai Rossnagel
(University of Kiel, Germany)
Michael Bauer
(University of Kiel, Germany)
