Interlayer sliding induced antiferroelectricity–ferroelectricity–antiferroelectricity transition in bilayer δ-SiX (X = S/Se)

There is a reversible antiferroelectric–ferroelectric–antiferroelectric (AFE–FE–AFE) phase transition appearing through mechanical interlayer sliding for bilayer δ-SiX (X =S/Se), bringing up more opportunities for novel volatile devices.