1. Instituto de Ciencia de Materiales de Barcelona (ICMAB-CSIC), 08193 Bellaterra, Barcelona, Spain
2. Electrical Engineering Department, Nanoelectronic Center, Technion, 32000 Haifa, Israel
3. SpLine CRG BM25 Beamline, European Synchrotron Radiation Facility, 71, Avenue des Martyrs, 38000 Grenoble, France
4. Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas (ICMM-CSIC), 28049 Madrid, Spain
5. CIBER-BBN, Campus UAB, 08193 Bellaterra, Spain