THIN FILM WITH SUPERPOWER TRANSVERSE PIEZOELECTRIC RESPONSE

摘要

The piezoelectric effect describes a material's ability to convert mechanical motion to electrical power or vica versa, and such materials are widely used in many applications such as quartz watches, sensors, and acoustic devices. This mechanical-electrical coupling can take place in various orientations. Transverse piezoelectricity, where lateral strain occurs in response to a vertical electric field, is rare but especially helpful for thin film actuators and MEMS devices that are increasingly useful in electronic devices. Now, Zhong-Xia Wang, Peng-Fei Li, and co-workers report the rare discovery of a molecular ferroelectric thin film that exhibits transverse piezoelectricity.