1. I. Institute of Physics (IA); RWTH Aachen University; 52056 Aachen Germany
2. Institute of Inorganic Chemistry; RWTH Aachen University; 52056 Aachen Germany
3. Jülich-Aachen Research Alliance (JARA-HPC); RWTH Aachen University; 52056 Aachen Germany
4. JARA-FIT Institute Green-IT; RWTH Aachen University and Forschungszentrum Jülich; 52056 Aachen Germany