Recently, it has been demonstrated that the absorption of moderately doped two-
dimensional semiconductors can be described in terms of exciton polarons. In this scenario …

The realization of mixtures of excitons and charge carriers in van der Waals materials
presents a frontier for the study of the many-body physics of strongly interacting Bose-Fermi …

We report on the observation of Fermi-edge singularity in the optical absorption and
emission spectra of high-quality degenerate Ga-doped ZnO (GZO) films from cryogenic to …

Single-and two-particle spectra of a single immobile impurity immersed in a fermionic bath
can be computed exactly and are characterized by divergent power laws (edge …

This thesis explores systems that exhibit strong coupling between an optical cavity field and
a many-particle system. To treat the drive and dissipative nature of the cavity on the same …

Summary The Landau-Ginzburg-Wilson (LGW) paradigm is the backbone of the modern
understanding of critical phenoma. It rests on the assumption that a continuous phase …

Abstract The Landau-Ginzburg-Wilson (LGW) paradigm is the backbone of the modern
understanding of critical phenoma. It rests on the assumption that a continuous phase …

Doping plays a decisive role for the functionality of semiconductor-based (opto-) electronic
devices. Hence, the technological utilization of semiconductors necessitates control and a …