GaPS4 is a 2D auxetic material with exotic mechanical and optical properties. In 2D form, it exhibits negative Poisson’s ratio both in-plane and out-of-plane directions.
Cr2S3 is ferrimagnetic layered semiconductor in its bulk form with Tc≈125 K. Cr2S3 crystallizes in rhombohedral R¯3 geometry and exhibit rather unique structure.