1. Department of Applied Physics and Quantum Phase Electronics Center, University of Tokyo, Tokyo 113-8656, Japan
2. PRESTO, Japan Science and Technology Agency, Tokyo 113-8656, Japan
3. RIKEN Center for Emergent Matter Science, Wako 351-0198, Japan
4. Department of Physics, National Taiwan University, Taipei 10617, Taiwan
5. Physics Division, National Center for Theoretical Sciences, Taipei 10617, Taiwan
6. Tokyo College, University of Tokyo, Tokyo 113-8656, Japan