title: Piezoelectricity in two-dimensional materials.
authors.affiliation: Materials Science and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900 (Saudi Arabia). tao.wu@kaust.edu.sa.
authors.forename: Tom
authors.initials: T
authors.lastname: Wu
authors.forename: Hua
authors.initials: H
authors.lastname: Zhang
keywords: piezoelectricity; thin films; transition-metal dichalcogenides; two-dimensional materials