2D Piezoelectrics, Pyroelectrics, and Ferroelectrics

In recent years, a range of two-dimensional (2D) layered materials have been experimentally confirmed or theoretically predicted as piezoelectric, pyroelectric, or ferroelectric. Compared with their bulk counterparts, the vdW piezoelectric, pyroelectric, or ferroelectric materials have many distinct properties, such as tunable bandgap, negative piezoelectric constant, and high mechanical flexibility. Furthermore, the stackable nature of 2D layered materials makes them promising building blocks for designing functional heterostructure where 2D layers are integrated with piezoelectric, pyroelectric or ferroelectric materials. These new materials and heterostructures have broad applications in memory, logic, sensing, optical, and energy harvesting devices. This Special Topic is intended to bring together researchers working or seeking to work on these novel materials.

Guest Editors: Wenjuan Zhu, Peide Ye, Xia Hong, and Gu Yi