Researchers show that Platinum diselenide is a promising 2D material for terahertz valleytronics

Researchers from CNRS in France demonstrated that Platinum diselenide (PtSe₂) is a promising 2D material for a terahertz (THz) range valleytronics device.

The researchers explain that PtSe₂ is promising as, unlike other transition metal dichalcogenides (TMDs), its bandgap can be uniquely tuned from a semiconductor in the near-infrared to a semimetal with the number of atomic layers. This gives the material unique THz photonic properties that can be layer-engineered. In this research, the main demonstration was that a controlled THz nonlinearity - tuned from monolayer to bulk - can be realized in wafer size polycrystalline through the generation of ultrafast photocurrents and the engineering of the bandstructure valleys.