Above-Curie-temperature ultrafast terahertz emission and spin current generation in a 2D superlattice (Fe₃GeTe₂/CrSb)₃.

ABSTRACT: The increasing demand for denser information storage and faster data processing has fueled a keen interest in exploring spin currents up to terahertz (THz) frequencies. Emergent 2D intrinsic magnetic materials constitute a novel and highly controllable platform to access such femtosecond spin dynamics at atomic layer thickness. However, the function of 2D van der Waals magnets are limited by their Curie temperatures, which are usually low. Here, in a 2D superlattice (Fe₃GeTe₂/CrSb)₃, we demonstrate ultrafast laser-induced spin current generation and THz radiation at room temperature, overcoming the challenge of the Curie temperature of Fe₃GeTe₂ being only 206 K. In tandem with time-resolved magneto-optical Kerr effect measurements and

SUBMITTER: Li P 

PROVIDER: S-EPMC11827587 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature