1. RWTH Aachen University; Chair for Electronic Devices; Otto-Blumenthal-Str. 2 52074 Aachen Germany
2. University of Siegen; School of Science and Technology; Hölderlinstr. 3 57076 Siegen Germany
3. IMS Laboratory; Centre National de la Recherche Scientifique; University of Bordeaux; Talence 33415 France
4. AMO GmbH; Advanced Microelectronics Center Aachen; Otto-Blumenthal-Str. 25 52074 Aachen Germany
5. Technical University of Catalonia; Department of Electronics Engineering, UPC; 08034 Barcelona Spain