1. Condensed Molecular Materials Lab., RIKEN, Wako, Saitama 351-0198
2. Institute for Molecular Science, Myodaiji, Okazaki 444-8585
3. Department of Materials Science, Graduate School of Science, Osaka City University, Sugimoto, Sumiyoshi-ku, Osaka 558-8585
4. Institute for Solid State Physics, University of Tokyo, Kashiwanoha, Kashiwa, Chiba 277-8581
5. Department of Chemistry, Faculty of Science, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551
6. Institute of Materials Structure Science, KEK, 1-1 Oho, Tsukuba, Ibaraki, 305-0801
7. Faculty of Science, Toho University, Miyama 2-2-1, Funabashi, Chiba 274-8510