抄録
Spin accumulation is generated by passing a charge current through a ferromagnetic layer and sensed by other ferromagnetic layers downstream. Pure spin currents can also be generated in which spin currents flow and are detected as a nonlocal resistance in which the charge current is diverted away from the voltage measurement point. Here, we report nonlocal spin-transport on two-dimensional surface-conducting SrTiO3 (STO) without a ferromagnetic spin-injector via the spin Hall effect (and inverse spin Hall effect). By applying magnetic fields to the Hall bars at different angles to the nonlocal spin-diffusion, we demonstrate an anisotropic spin-signal that is consistent with a Hanle precession of a pure spin current. We extract key transport parameters for surface-conducting STO, including: a spin Hall angle of γ≈ (0.25 ± 0.05), a spin lifetime of τ ∼49 ps, and a spin diffusion length of λs ≈ (1.23 ± 0.7) μm at 2 K.
本文言語 | 英語 |
---|---|
ページ(範囲) | 6511-6517 |
ページ数 | 7 |
ジャーナル | Nano Letters |
巻 | 21 |
号 | 15 |
DOI | |
出版ステータス | 出版済み - 8月 11 2021 |
!!!All Science Journal Classification (ASJC) codes
- バイオエンジニアリング
- 化学 (全般)
- 材料科学(全般)
- 凝縮系物理学
- 機械工学