1. National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, and School of Physics, Nanjing University, Nanjing, China
2. Atom Manufacturing Institute (AMI), Nanjing, China
3. State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, China
4. Beijing Key Laboratory of Optoelectronic Functional Materials and Micro-Nano Devices, and Department of Physics, Renmin University of China, Beijing, China