1. Center for Computational Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
2. Chemistry Course, Division of Material Chemistry, Graduate School of Natural Science and Technology, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa 920-1192, Japan
3. Nanomaterials Research Institute (NanoMaRI), Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa 920-1192, Japan