1. Chair of Electronic Devices, RWTH Aachen University, Otto-Blumenthal-Str. 2, 52074 Aachen, Germany
2. AMO GmbH, Advanced Microelectronic Center Aachen (AMICA), Otto-Blumenthal-Str. 25, 52074 Aachen, Germany
3. Institute of Physics, Faculty of Electrical Engineering and Information Technology, Universität der Bundeswehr München, Werner-Heisenberg-Weg 39, 85577 Neubiberg, Germany
4. Division of Micro and Nanosystems, KTH Royal Institute of Technology, Malvinas Väg 10, 10044 Stockholm, Sweden
5. Department of Precision and Microsystems Engineering, Delft University of Technology, Mekelweg 2, 2628 CD Delft, Netherlands
6. Infineon Technologies AG, Wernerwerkstraße 2, 93049 Regensburg, Germany
7. 2nd Institute of Physics, RWTH Aachen University, Otto-Blumenthal-Str., 52074 Aachen, Germany
8. Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, Netherlands