1. Center for Emergent Matter Science (CEMS), RIKEN, Hirosawa, Wako Saitama 351-0198, Japan
2. The Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan
3. Department of Electrical Engineering and Information Systems, The University of Tokyo, Bunkyo-ku, Tokyo 113-8656, Japan
4. Center for Spintronics Research Network (CSRN), The University of Tokyo, Bunkyo-ku, Tokyo 113-8656, Japan
5. Trans-scale Quantum Science Institute, The University of Tokyo, Bunkyo, Tokyo 113-0033, Japan