作者机构:[1]The Provincial Key Laboratory of Piezoelectric Ceramics Materials and Apparatus, Faculty of Physics and Electronic Technology, Hubei University, Wuhan 430062, China, [2]Department of Physics, Nanjing University, Nanjing 210093, China
相关基金:The authors thank the National Natural Science Foundation of China (Grant No. 10774040) and the joint Chinese-Russian Project for their financial supports.