Ultrafast THz probing of nonlocal orbital current in transverse multilayer metallic heterostructures.

ABSTRACT: THz generation from femtosecond photoexcited spintronic heterostructures has become a versatile tool for investigating ultrafast spin-transport and transient charge-current in a non-contact and non-invasive manner. The equivalent effect from the orbital degree of freedom is still in the primitive stage. Here, we experimentally demonstrate orbital-to-charge current conversion in metallic heterostructures, consisting of a ferromagnetic layer adjacent to either a light or a heavy metal layer, through detection of the emitted THz pulses. Our temperature-dependent experiments help to disentangle the orbital and spin components that are manifested in the respective Hall-conductivities, contributing to THz emission. NiFe/Nb shows the strongest inverse orbital Hall effect with an experimentally ex

SUBMITTER: Kumar S 

PROVIDER: S-EPMC10713980 | biostudies-literature | 2023 Dec

REPOSITORIES: biostudies-literature