Affiliation: | 1. Department of Physics, Ritsumeikan University, Kusatsu 525-8577, Japan;2. Department of Physics, Kyoto University, Kyoto 606-8502, Japan;3. RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan;4. CCSE, Japan Atomic Energy Agency, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8587, Japan;5. Department of Physics, Hanyang University, Seongdong, Seoul 133-791, Republic of Korea |