Giant piezoelectricity in group IV monochalcogenides with ferroelectric AA layer stacking

Seungjun Lee, Hyeong-Ryul Kim, Wei Jiang +2

The piezoelectricity of group IV monochalcogenides (MXs, with M = Ge, Sn and X = S, Se) has attracted much attention due to their substantially higher piezoelectric coefficients co…