1. Division of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
2. HAKUBI Center for Advanced Research, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
3. JST-PRESTO, Honcho 4-1-8, Kawaguchi, Saitama 332-0012, Japan
4. Ultramicroscopy Research Center, Kyushu Uiversity, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
5. Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University, Nishi-ku, Fukuoka 819-0395, Japan
6. Center for Synchrotron Radiation Research, Japan Synchrotron Radiation Research Institute (JASRI) SPring-8, Sayo, Hyogo 679-5198, Japan
7. Department of Physics, Graduate School of Science, Osaka Metropolitan University, Sakai, Osaka 599-8531, Japan