1. Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP), Technische Universität Dresden, 01069 Dresden, Germany
2. Center for Advancing Electronics Dresden (cfaed) and Faculty of Electrical and Computer Engineering, Technische Universität Dresden, 01062 Dresden, Germany
3. Istituto di Cristallografia, Consiglio Nazionale delle Ricerche, Strada Statale 14-km 163, 5, AREA Science Park, Basovizza, 34149 Trieste, Italy
4. Dresden Center for Nanoanalysis (DCN), cfaed, Technische Universität Dresden, Helmholtz Str. 18, 01069 Dresden, Germany