Origin of giant negative piezoelectricity in a layered van der Waals ferroelectric

• Main Authors: You, Lu, Zhang, Yang, Zhou, Shuang, Chaturvedi, Apoorva, Morris, Samuel A., Liu, Fucai, Chang, Lei, Ichinose, Daichi, Funakubo, Hiroshi, Hu, Weijin, Wu, Tom, Liu, Zheng, Dong, Shuai, Wang, Junling
• Other Authors: School of Materials Science & Engineering
• Format: Article
• Language: English
• Published: 2019
• Subjects: DRNTU::Engineering::Materials; Piezoelectricity; Van der Waals Forces
• Online Access: https://hdl.handle.net/10356/90304; http://hdl.handle.net/10220/48489
• Institution: Nanyang Technological University

Recent research on piezoelectric materials is predominantly devoted to enhancing the piezoelectric coefficient, but overlooks its sign, largely because almost all of them exhibit positive longitudinal piezoelectricity. The only experimentally known exception is ferroelectric polymer poly(vinylidene...