1. Center for Basic Research on Materials, National Institute for Materials Science, Tsukuba, Japan
2. Department of Physics, University of Science and Technology of China, Hefei, China
3. Electron Microscope Systems Design Department, Hitachi High-Tech Corporation, Hitachinaka, Japan
4. Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science, Tsukuba, Japan
5. Department of Physics, Xiamen University, Xiamen, China
6. Department of Physics and Institute for Nanoscience and Engineering, University of Arkansas, Fayetteville, AR, USA
7. Research Center for Electronic and Optical Materials, National Institute for Materials Science, Tsukuba, Japan
8. Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing, P.R. China
9. Key Laboratory of MEMS of Ministry of Education, School of Electronic Science and Engineering, Southeast University, Nanjing, People’s Republic of China
10. Research Network and Facility Services Division, National Institute for Materials Science, Tsukuba, Japan