1. Department of Physics, University of Tokyo, Bunkyo, Tokyo 113-0033, Japan
2. Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, Sendai 980-8578, Japan
3. Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, Sendai 980-8577, Japan
4. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
5. National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
6. Institute for Solid State Physics (ISSP), University of Tokyo, Kashiwa, Chiba 277-8581, Japan
7. Materials Sciences Research Center, Japan Atomic Energy Agency (JAEA), Sayo, Hyogo 679-5148, Japan
8. Department of Quantum Matter, ADSM, Hiroshima University, Higashihiroshima, Hiroshima 739-8530, Japan
9. Center for Spintronics Research Network, The University of Tokyo, Bunkyo, Tokyo 113-8656, Japan
10. Department of Electrical Engineering and Information Systems, The University of Tokyo, Bunkyo, Tokyo 113-8656, Japan
11. Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
12. Kavli Institute for Theoretical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
13. RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan
14. Department of Physics, Columbia University, New York, NY 10027, U.S.A.
15. Collaborative Innovation Center of Quantum Matter, Beijing, China
16. Department of Applied Physics, Waseda University, Shinjuku, Tokyo 169-8555, Japan