1. Division of Applied Physics
2. Faculty of Engineering
3. Hokkaido University
4. Sapporo
5. Japan
6. Institute for Solid State Physics and Optics
7. Wigner Research Centre for Physics
8. Hungarian Academy of Sciences
9. H-1525 Budapest
10. Hungary
11. RIKEN Center for Emergent Matter Science (CEMS)
12. Wako, Saitama 351-0198