1. Fraunhofer Institute for Applied Solid State Physics IAF, Tullastraße 72, 79108 Freiburg, Germany
2. Fraunhofer Institute for Mechanics of Materials IWM, Woehlerstrasse 11, 79108 Freiburg, Germany
3. Institute for Sustainable Systems Engineering (INATECH), Albert-Ludwigs-University Freiburg, Emmy-Noether-Str. 2, 79110 Freiburg, Germany