1. Catalan Institute of Nanoscience and Nanotechnology (ICN2)
2. CSIC
3. The Barcelona Institute of Science and Technology
4. 08193 Barcelona
5. Spain
6. Instituto de Microelectronica de Madrid
7. IMM-CNM
8. 28760 Tres Cantos (Madrid)
9. Institut für Physik
10. Johannes Gutenberg Universität Mainz
11. 55128 Mainz
12. Germany
13. Graduate School Materials Science in Mainz