1. Vacuum Interconnected Nanotech Workstation (Nano-X), Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences (CAS), Suzhou 215123, China
2. School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei 230026, China
3. Key Laboratory of Nanodevices and Applications, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
4. School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
5. State Key Laboratory of Crystal Materials, Shandong University, Jinan, Shandong 250100, China
6. Electronic Materials Research Laboratory Key Laboratory of the Ministry of Education and International Center for Dielectric Research, Electronic Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China
7. Department of Electrical and Electronic Engineering, Synchrotron Light Application Center, Saga University, Saga 840-8502, Japan