  Copper indium thiophosphate, CuInP2S6, has attracted much attention in recent
years due to its van der Waals layered structure and robust ferroelectricity at
room temperature. In this review, we aim to give an overview of the various
properties of CuInP2S6, covering structural, ferroelectric, dielectric,
piezoelectric and transport properties, as well as its potential applications.
We also highlight the remaining questions and possible research directions
related to this fascinating material and other compounds of the same family.
