1. Fundamental Research Department, Comet Co. Ltd, Tsukuba, Japan
2. Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Japan
3. The Technology Centre of Academy of Science and Technology, Ashgabat, Turkmenistan
4. Institute for Solid State Physics, University of Tokyo, Chiba, Japan
5. Japan Science and Technology Agency, JST PRESTO, Saitama, Japan
6. North Japan Research Institute for Sustainable Energy, Hirosaki University, Aomori City, Japan
7. Department of Electrical, Electronics and Information Engineering, Faculty of Engineering, Kanagawa University, Yokohama-shi, Japan
8. National Institute for Materials Science, NIMS, Tsukuba, Japan