1. Department of Materials Engineering Science
2. Graduate School of Engineering Science
3. Osaka University
4. Toyonaka
5. Japan
6. First-principles Simulation Group
7. Nano-Theory Field
8. International Center for Materials Nanoarchitectonics (WPI-MANA)
9. National Institute for Materials Science (NIMS)
10. Tsukuba
11. Research Center for Ultra-High Voltage Electron Microscopy
12. Ibaraki