1. Research Organization for Information Science & Technology, 2-32-3, Kitashinagawa, Shinagawa-ku, Tokyo 140-0001, Japan
2. Department of Physics, Department of Materials
Science and Engineering, Department of Chemistry, Center for 2-Dimensional
and Layered Materials and Center for Atomically Thin Multifunctional
Coatings (ATOMIC), The Pennsylvania State University, University Park, Pennsylvania 16802, United States