1. State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics and Tsinghua-Foxconn Nanotechnology Research Center, Tsinghua University, Beijing 100084, China.
2. Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
3. Fert Beijing Research Institute, School of Electrical and Information Engineering, Big Data and Brain Computing (BDBC), Beihang University, Beijing 100191, China.
4. National Center for Electron Microscopy in Beijing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.
5. RIKEN Center for Emergent Matter Science, Wako, Saitama 351-0198, Japan.
6. Collaborative Innovation Center of Quantum Matter, Beijing 100084, China.
7. School of Physics and State Key Laboratory of Crystal Materials, Shandong University, Jinan, Shandong 250100, China.
8. Key Laboratory for the Physics and Chemistry of Nanodevices, Department of Electronics, Peking University, Beijing 100871, China.