1. Advanced Institute for Computational Science, RIKEN, Kobe 650-0047, Japan
2. Condensed Matter Theory Laboratory, RIKEN, Wako, Saitama 351-0198, Japan
3. Quantum Matter Theory Research Team, RIKEN CEMS, Wako, Saitama 351-0198, Japan
4. JST, CREST, Wako, Saitama 351-0198, Japan
5. Department of Applied Physics, University of Tokyo, Bunkyo, Tokyo 113-8656, Japan