1. Department of Physics and Astronomy, Howard University, Washington, DC 20059, United States
2. Department of Chemistry, The Johns Hopkins University, Baltimore, Maryland 21218, United States
3. Institute for Quantum Matter, The William H. Miller III Department of Physics and Astronomy, The Johns Hopkins University, Baltimore, Maryland 21218, United States
4. National Synchrotron Light Source-II, Brookhaven National Laboratory, Upton, New York 11733, United States