1. Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States
2. Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
3. SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
4. Beijing National Laboratory for Condensed Matter Physics, Key Laboratory for Nanoscale Physics and Devices, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
5. Department of Materials Science and Engineering, University of Washington, Seattle, Washington 98195, United States
6. Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States