Identifying intrinsic ferroelectricity of thin film with piezoresponse force microscopy (vol 7, 095116, 2017)Guan, Zhao; Jiang, Zhen-Zheng; Tian, Bo-Bo; Zhu, Yi-Ping; Xiang, Ping-Hua; Zhong, Ni*; Duan, Chun-Gang; Chu, Jun-HaoScience Citation Index Expanded-摘要-关键词-