1. College of Physics and Information Technology, Shaanxi Normal University, Xian 710062, Shaanxi, People’s Republic of China, State Key Laboratory for Mechanical Behavior of Materials, Xian Jiaotong University, Xian 710049, Shaanxi, People’s Republic of China, and ICMMO/LEMHE UMR CNRS 8182, Université Paris-Sud 11, 91405 Orsay Cedex, France