**Principal Investigator:** Fakher Assaad, Lehrstuhl für Theoretische Physik I, Julius-Maximilian-Universität Würzburg

**HPC Platform used:** SuperMUC and SuperMUC-NG of LRZ

**Local Project ID:** pr94vu

To unravel the complexity of the solid state, researchers from the University of Würzburg have mastered very different and complementary methods. Density functional theory in the local density approximation with added dynamical local interactions using the dynamical mean-field approximation has the merit of being material dependent since one can include the chemical constituents of materials. Spacial and temporal fluctuations are crucial to understand e.g. the Iridates, a topic that is explored with the new pseudo-fermion functional renormalization group. Another aspect of this research are realistic quantum Monte Carlo simulations of free standing graphene aiming to elucidate the role of electronic correlations.