1. Department of Electrical Engineering and Information Systems School of Engineering The University of Tokyo 7‐3‐1 Hongo, Bunkyo‐ku Tokyo 113–8656 Japan
2. Nippon Shokubai Co., Ltd. 5–8 Nishi Otabi‐cho, Suita Osaka 564–8512 Japan
3. Nippon Shokubai Research Alliance Laboratories Osaka University 2‐1 Yamadaoka Suita Osaka 565–0871 Japan
4. Japan Broadcasting Corporation (NHK) Science & Technology Research Laboratories 1‐10‐11 Kinuta, Setagaya‐ku Tokyo 157–8510 Japan
5. Center for Emergent Matter Science RIKEN, 2‐1 Hirosawa, Wako Saitama 351–0198 Japan
6. Thin‐Film Device Laboratory RIKEN, 2‐1 Hirosawa, Wako Saitama 351–0198 Japan