1. International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki, Japan
2. Amano-Koide Collaborative Research Lab, National Institute for Materials Science, Tsukuba, Ibaraki, Japan
3. Wide Bandgap Materials Group, National Institute for Materials Science (NIMS), Ibaraki, Japan
4. State Key Laboratory of Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing, China