1. Department of Physics, Budapest University of Technology and Economics, Budafoki út 8., H-1111 Budapest, Hungary
2. Department of Physics, Budapest University of Technology and Economics and MTA-BME Condensed Matter Research Group and MTA-BME Lendület Magneteo-optical Research Group, Budafoki út 8., H-1111 Budapest, Hungary
3. Institute of Physics of Complex Matter, FBS, Swiss Federal Institute of Technology (EPFL), CH-1015 Lausanne, Switzerland