1. National High Magnetic Field Lab, Florida State University, 1800 East Paul Dirac Drive, Tallahassee, Florida 32310, United States
2. Department of Physics and Center for 2-Dimensional
and Layered Materials, Pennsylvania State University, University
Park, State College, Pennsylvania 16802, United States
3. Computational & Information Sciences Directorate, U.S. Army Research Laboratory, Adelphi, Maryland 20783, United States
4. Sensor & Electron Devices Directorate, U.S. Army Research Laboratory, Adelphi, Maryland 20783, United States
5. Department of Physics, Florida State University, Tallahassee, Florida 32306, United States
6. Engineering Physics Division, Physics Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
7. Department of Physics, Applied Physics and Astronomy, Rensselaer Polytechnic Institute, 110 Eighth Street, Troy, New York 12180, United States
8. Department of Chemistry and Department
of Materials Science and Engineering, The Pennsylvania State University, University Park, State College, Pennsylvania 16802, United States
9. Carbon Institute of Science and Technology, Shinshu University, Wakasato 4-17-1, Nagano-city 380-8553, Japan