Skip to main content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Interface-generated spin currents

Published

Author(s)

Vivek P. Amin, Jan Zemen, Mark D. Stiles

Abstract

Transport calculations based on ab-initio band structures reveal large interface-generated spin currents at Co/Pt, Co/Cu, and Pt/Cu interfaces. These spin currents are driven by in-plane electric fields but flow out-of-plane, and can have similar strengths to spin currents generated by the spin Hall effect in bulk Pt. Each interface generates spin currents with polarization along $\zhat \times \threevec{E}$, where $\zhat$ is the interface normal and $\threevec{E}$ denotes the electric field. The Co/Cu and Co/Pt interfaces additionally generate spin currents with polarization along $\mhat \times (\zhat \times \threevec{E})$, where $\mhat$ gives the magnetization direction of Co. The latter spin polarization is controlled by---but not aligned with---the magnetization, providing a novel mechanism for generating spin torques in magnetic trilayers.
Citation
Physical Review Letters
Volume
121
Issue
13

Keywords

Spintronics, Spin current, Spin-orbit torque, Magnetic memories
Created September 26, 2018, Updated November 10, 2018