Affiliation: | 1. Nanoelectronics Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan;2. Institute of Industrial Science, The University of Tokyo, Tokyo, Japan;3. Institute for Materials Research, Tohoku University, Sendai, Japan;4. International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science, Tsukuba, Japan |