1. Institute of Solid State Electronics, Technische Universität Wien, Gußhausstraße 25-25a, 1040 Vienna, Austria
2. Infineon Technologies Austria AG, Siemensstraße 2, 9500 Villach, Austria
3. Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
4. International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
5. IFTO, Friedrich Schiller Universität, Max-Wien Platz 1, 07743 Jena, Germany