1. Department of Physics, Columbia University, New York, NY 10027, USA.
2. Department of Mechanical Engineering, Columbia University, New York, NY 10027, USA.
3. Department of Physics, University of California, San Diego, La Jolla, CA 92093, USA.
4. Max Planck Institute for the Structure and Dynamics of Matter, Center for Free Electron Laser Science, Hamburg 22761, Germany.
5. Università degli Studi di Palermo, Dipartimento di Fisica e Chimica Emilio Segrè, via Archirafi 36, I-90123 Palermo, Italy.
6. Department of Physics, Pennsylvania State University, University Park, PA 16802, USA.
7. 2D Crystal Consortium, Materials Research Institute, Pennsylvania State University, University Park, PA 16802, USA.
8. Center for Computational Quantum Physics (CCQ), Flatiron Institute, New York, NY 10010, USA.