| Affiliation: | 1. WPI Advanced Institute for Materials Research, Tohoku University, Sendai, Japan;2. PRESTO, Japan Science and Technology Agency, Saitama, Japan;3. State Key Laboratory of Polar Materials and Devices, Ministry of Education of China, East China Normal University, Shanghai, China;4. Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai, Japan;5. New Industry Creation Hatchery Center, Tohoku University, Sendai, Japan;6. CREST, Japan Science and Technology Agency, Saitama, Japan |
