1. School of Material Science and Engineering, Xi’an Polytechnic University, Xi’an, 710049 Shaanxi, China
2. School of Physics, Key Laboratory of Shaanxi for Advanced Functional Materials and Mesoscopic Physics, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi’an Jiaotong University, Xi’an, 710049 Shaanxi, China
3. Xi’an High-tech Research Institute, 710025 Xi’an, China
4. Department of Physics, City University of Hong Kong, Kowloon, Hong Kong
5. Electrical Engineering Department, Sukkur IBA University, Airport Road, Sukkur 65200, Pakistan
6. Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China