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. State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, China and Department of Physics and Opt-Electronic Engineering, Xi'an University of Arts and Science, Xi'an 710065, Shaanxi, China