1. Key Laboratory of Applied Surface and Colloid Chemistry (Ministry of Education) Shaanxi Key Laboratory for Advanced Energy Devices School of Materials Science and Engineering Shaanxi Normal University Xi'an 710119 P. R. China
2. Wuhan National High Magnetic Field Centre Department of Physics Huazhong University of Science and Technology Wuhan 430074 P. R. China
3. Shenzhen Key Laboratory of Nanobiomechanics Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen Guangdong 518055 P. R. China
4. State Key Laboratory of Material Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan 430074 P. R. China
5. School of Physics and Information Technology Shaanxi Normal University Xi'an 710119 P. R. China
6. Key Lab of Advanced Optoelectronic Quantum Architecture and Measurement (Ministry of Education) School of Physics Beijing Institute of Technology Beijing 100081 P. R. China