Ultrafast coherent THz lattice dynamics coupled to spins in a van der Waals antiferromagnetic flake

Fabian Mertens, David Mönkebüscher, Eugenio Coronado +8

A coherent THz optical lattice mode is triggered by femtosecond laser pulses in the antiferromagnetic van der Waals semiconductor FePS${}_3$. The 380 nm thick exfoliated flake was pl…