1. Department of Physics, Columbia University, New York, New York 10027, United States
2. Theory Department, Max Planck Institute for Structure and Dynamics of Matter and Center for Free-Electron Laser Science, 22761 Hamburg, Germany
3. Department of Applied Physics and Applied Mathematics, Columbia University, New York, New York 10027, United States
4. Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
5. Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
6. Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
7. Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, United States
8. Research Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
9. Research Center for Electronic and Optical Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
10. Department of Physics, University of California San Diego, La Jolla, California 92093, United States
11. Center for Computational Quantum Physics, Flatiron Institute, New York, New York 10010, United States
12. Nano-Bio Spectroscopy Group, Universidad del País Vasco UPV/EHU, San Sebastián 20018, Spain
13. Department of Mechanical Engineering, Columbia University, New York, New York 10027, United States