1. Department of Energy Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
2. PRESTO, Japan Science and Technology Agency, Kawaguchi 332-0012, Japan
3. Department of Innovative and Engineered Material, Tokyo Institute of Technology, Yokohama 226-8503, Japan
4. Synchrotron X-ray Group and Synchrotron X-ray Station at SPring-8, National Institute for Materials Science, 1-1-1 Kouto, Sayo, Hyogo 679-5148, Japan
5. Micron Oxford, Department of Biochemistry, University of Oxford, Oxford OX1 3QU, United Kingdom
6. Institute for Materials Research, Tohoku University, Sendai, Miyagi 980-8577, Japan
7. School of Materials and Chemical Technology, Tokyo Institute of Technology, Yokohama 226-8502, Japan