1. ICQD/Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, and Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
2. Departments of Chemistry, and Physics and Astronomy, University of Southern California, Los Angeles, CA 90089, USA.
3. Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA 15260, USA.
4. Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
5. Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, PA 15261, USA.