Influence of Metal Interlayers on Spin-Charge Conversion in Sb₂Te₃ Topological Insulator-Based Devices.

ABSTRACT: The magnetization of a ferromagnetic layer can be controlled via spin-charge conversion (SCC) phenomena originating in an adjacent topological insulator (TI). Insertion of nonmagnetic interlayers between these materials has been demonstrated to enhance the SCC efficiency, as shown for Sb₂Te₃/Au/Co(Fe) heterostructures. The inert nature of the Sb₂Te₃/Au interface was assumed to preserve the topological surface state (TSS) of Sb₂Te₃, which mediates the SCC. Al is explored as an alternative to Au for its long spin diffusion length. Spin pumping experiments indicate the absence of SCC in the Sb₂Te₃/Al/Co heterostructure. Core level and valence band photoemission spectroscopies reveal that Al forms stable co

SUBMITTER: Longo E 

PROVIDER: S-EPMC12046589 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature