1. Institute of Innovative Research Tokyo Institute of Technology 4269 Nagatsuta, Midori-ku Yokohama 226-8503 Japan
2. JST-ERATO, Yamamoto Atom Hybrid Project Tokyo Institute of Technology 4269 Nagatsuta, Midori-ku Yokohama 226-8503 Japan
3. Rigaku Corporation 3-9-12, Matsubara-cho Akishima-shi 196-8666 Japan