1. Department of Computational Science, Faculty of Science, Kanazawa University, Kakuma, Kanazawa 920-1192, Japan
2. Bogolyubov Institute for Theoretical Physics, The Ukranian National Academy of Science, Kiev 252143, Ukraine
3. Institute of Physics of Semiconductors, The Ukranian National Academy of Science, Kiev 252028, Ukraine
4. Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan