1. NaMLab gGmbH, Nöthnitzer
Str. 64, D-01187 Dresden, Germany
2. Institute
for Solid State Physics, University of Jena, Helmholtzweg 3, D-07743 Jena, Germany
3. Helmholtz−Zentrum Dresden−Rossendorf, Bautzner Landstr. 400, D-01328 Dresden, Germany
4. Chair
of Nanoelectronic Materials, Institute of Semiconductor and Microsystems,
Faculty of Electrical and Computer Engineering, TU Dresden, Nöthnitzer
Str. 64, D-01187 Dresden, Germany