1. Department of Condensed Matter Physics and Material Sciences S. N. Bose National Centre for Basic Sciences Block JD, Sector‐III, Salt Lake Kolkata 700106 India
2. Institute of Spintronics and Quantum Information Faculty of Physics Adam Mickiewicz University Poznań, Uniwersytetu Poznanskiego 2 Poznań 61‐614 Poland
3. Center for Emergent Matter Science RIKEN, 2‐1 Hirosawa Wako 351‐0198 Japan
4. Institute for Solid State Physics University of Tokyo Kashiwa 277‐8581 Japan