Efficient ultrafast field-driven spin current generation for spintronic terahertz frequency conversion.

ABSTRACT: Efficient generation and control of spin currents launched by terahertz (THz) radiation with subsequent ultrafast spin-to-charge conversion is the current challenge for the next generation of high-speed communication and data processing units. Here, we demonstrate that THz light can efficiently drive coherent angular momentum transfer in nanometer-thick ferromagnet/heavy-metal heterostructures. This process is non-resonant and does neither require external magnetic fields nor cryogenics. The efficiency of this process is more than one order of magnitude higher as compared to the recently observed THz-induced spin pumping in MnF₂ antiferromagnet. The coherently driven spin currents originate from the ultrafast spin Seebeck effect, caused by a THz-induced temperature imbalance in

SUBMITTER: Ilyakov I 

PROVIDER: S-EPMC10622539 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature