Kevin Meyer (Institute of Energy Research and Physical Technologies IEPT, TU Clausthal / DE), Tobias Westphal (4th Institute of Physics - Solids and Nanostructures, University of Goettingen / DE), Christoph Flathmann (4th Institute of Physics - Solids and Nanostructures, University of Goettingen / DE), Dr. Tobias Meyer (Institute of Material Physics, University of Goettingen / DE), Prof. Dr. Michael Seibt (4th Institute of Physics - Solids and Nanostructures, University of Goettingen / DE), Prof. Dr. Daniel Schaadt (Institute of Energy Research and Physical Technologies IEPT, TU Clausthal / DE)