1. Institute of Electronic Structure and Laser, Foundation for Research and Technology – Hellas, Vassilika Vouton, 71110 Heraklion, Greece
2. Department of Chemistry, University of Crete, Voutes, 71003 Heraklion, Greece
3. Institute of Nanoscience and Nanotechnology, National Center for Scientific Research Demokritos, 15310 Athens, Greece
4. CNR-SPIN and Department of Physics “E. Pancini”, University of Naples Federico II, Piazzale V. Tecchio 80, 80125 Naples, Italy
5. Photon Sciences Division, National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, New York 11973, USA
6. Condensed Matter Physics and Materials Science Division, Brookhaven National Laboratory, Upton, New York 11973, USA