1. Department of Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
2. Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
3. Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
4. Department of Materials Science and Engineering, Pennsylvania State University, University Park, Pennsylvania 16801, United States
5. 2D Crystal Consortium Materials Innovation Platform, Materials Research Institute, Pennsylvania State University, University Park, Pennsylvania 16801, United States