Terahertz Spin-to-Charge Conversion by Interfacial Skew Scattering in Metallic Bilayers.

ABSTRACT: The efficient conversion of spin to charge transport and vice versa is of major relevance for the detection and generation of spin currents in spin-based electronics. Interfaces of heterostructures are known to have a marked impact on this process. Here, terahertz (THz) emission spectroscopy is used to study ultrafast spin-to-charge-current conversion (S2C) in about 50 prototypical F|N bilayers consisting of a ferromagnetic layer F (e.g., Ni₈₁ Fe₁₉ , Co, or Fe) and a nonmagnetic layer N with strong (Pt) or weak (Cu and Al) spin-orbit coupling. Varying the structure of the F/N interface leads to a drastic change in the amplitude and even inversion of the polarity of the THz charge current. Remarkably, when N is a material with small spin Hall angle, a dominant interfac

SUBMITTER: Gueckstock O 

PROVIDER: S-EPMC11469024 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature