1. Department of Physics, University of California, Berkeley, California 94720, United States
2. Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
3. Department of Material Science and Engineering, University of California, Berkeley, California 94720, United States
4. Department of Physics and MonArk NSF Quantum Foundry, University of Arkansas, Fayetteville, Arkansas 72701, United States
5. The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
6. Kavli Energy NanoScience Institute at the University of California, Berkeley, and Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
7. Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
8. Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana, 47907, United States
9. Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana, 47907, United States