1. Department of Physics, Graduate School of Science, Kobe University, Kobe 657-8501, Japan
2. Sysmex Corporation, Kobe 651-0073, Japan
3. Computational Materials Science Research Team, RIKEN Center for Computational Science (R-CCS), Kobe 650-0047, Japan
4. JST, PRESTO, Kawaguchi, Saitama 332-0012, Japan
5. Department of Physics, National Taiwan University, Taipei 10617, Taiwan
6. Institute of Physics, Slovak Academy of Sciences, Bratislava 845 11, Slovakia