1. Department of Materials Science and Engineering, University of California, Berkeley, California94720, United States
2. Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California94720, United States
3. Institute for Advanced Study, Shenzhen University, Shenzhen518060, China
4. Department of Chemistry, University of Wisconsin - Madison, Madison, Wisconsin53706, United States
5. National Center for Electron Microscopy in Beijing, School of Materials Science and Engineering, Tsinghua University, Beijing100084, China
6. Department of Mechanical Engineering, University of California, Berkeley, California94720, United States
7. Physical & Life Sciences and NIF & Photon Sciences, Lawrence Livermore National Laboratory, Livermore, California94550, United States
8. School of Aerospace Engineering, Beijing Institute of Technology, Beijing, 100081, China