1. Department of Physics and Astronomy, George Mason University, Fairfax, Virginia 22030, USA
2. Quantum Science and Engineering Center, George Mason University, Fairfax, Virginia 22030, USA
3. Institute for Theoretical Physics and Astrophysics and Würzburg-Dresden Cluster of Excellence ct.qmats, University of Würzburg, Am Hubland, 97074 Würzburg, Germany
4. Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
5. Maryland Quantum Materials Center, Department of Physics, University of Maryland, College Park, Maryland 20742, USA
6. Canadian Institute for Advanced Research, Toronto, Ontario M5G 1Z8, Canada
7. Department of Physics, University at Buffalo, Buffalo, New York 14260, USA