1. Department of Chemistry, Graduate School of Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, Fukuoka 819-0395, Japan
2. Department of Complex Systems Science, Graduate School of Informatics, Furo-cho, Chikusa-Ward, Nagoya 464-8601, Japan
3. Department of Physics, School of Science and Technology, Meiji University, 1-1-1 Higashi-Mita, Tama-ku, Kanagawa, Kawasaki 214-8571, Japan
4. RIKEN Center for Computational Science, 7-1-26, Minatojima-Minami-Machi, Chuo-ku, Hyogo, Kobe 650-0047, Japan
5. Nanotechnology Research Centre, National Research Council Canada, 11421 Saskatchewan Drive NW, Edmonton AB T6G 2M9, Canada