1. Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan, Department of Physics, Arizona State University, Tempe, Arizona 85287-1504, United States, Graduate School of Human and Environmental Studies, Kyoto University, Yoshida-Nihonmatsu-Cho Sakyo-ku, Kyoto 606-8501, Japan, and Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China