Nickel oxide, a type-II antiferromagnet with $T_{{N\acute{e}el}}=523.6$ K, is a model system not only for a charge-transfer insulator but also a strongly correlated oxide. Despite of long-standing research its electronic structure is still object of great experimental as well as theoretical interest. The strong electronic correlation in NiO causes the appearance of lower and upper Hubbard...
For a number of femtosecond time resolved soft X-Ray experiments, it would be a great improvement to have a femtosecond laser driven X-Ray source as a tabletop setup. In my doctorate thesis, I want to use High Harmonic Generation (HHG) to shift mid infrared laser pulses to the soft X-Ray range. To have enough power in the X-Ray range to perform absorption spectroscopy experiments, I use an...
Table-top coherent ultrashort extreme ultraviolet light sources from high-harmonic generation have been shown to enable a wealth of novel experiments in the field of ultrafast surface science [1,2]. However, the full potential of this approach has not yet been achieved because, to date, high harmonics generated by low-repetition rate Ti:sapphire lasers required a trade-off between photon flux,...
In the Born-Oppenheimer picture, nuclear dynamics evolve across a potential energy surface determined by the time-dependent electronic structure and its transient occupation. In the case of photo-induced reactions, ab initio molecular dynamics (AIMD) simulations can provide the electronic and atomic structure of a system subsequent to impulsive excitation. Experimental access to the...
