1. State
Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, Shaanxi, China
2. College
of Physics and Information Technology, Shaanxi Normal University, Xi’an 710062, Shaanxi, China
3. Department
of Physics and Opt-electronic Engineering, Xi’an University of Arts and Science, Xi’an 710065, Shaanxi, China