Skip to main content
Dryad

Data for: Intrinsic spin Hall torque in a moiré Chern magnet

Cite this dataset

Redekop, Evgeny et al. (2023). Data for: Intrinsic spin Hall torque in a moiré Chern magnet [Dataset]. Dryad. https://doi.org/10.25349/D9GP7F

Abstract

In spin torque magnetic memories, electrically actuated spin currents are used to switch a magnetic bit. Typically, these require a multilayer geometry including both a free ferromagnetic layer and a second layer providing spin injection. For example, spin may be injected by a non-magnetic layer exhibiting a large spin Hall effect, a phenomenon known as spin-orbit torque. Here, we demonstrate a spin-orbit torque magnetic bit in a single two-dimensional system with intrinsic magnetism and strong Berry curvature. We study AB-stacked MoTe2/WSe2, which hosts a magnetic Chern insulator at a carrier density of one hole per moiré superlattice site. We observe hysteretic switching of the resistivity as a function of applied current. Magnetic imaging reveals that current switches correspond to reversals of individual magnetic domains. The real space pattern of domain reversals aligns with spin accumulation measured near the high Berry curvature Hubbard band edges. This suggests that intrinsic spin- or valley-Hall torques drive the observed current-driven magnetic switching in both MoTe2/WSe2 and other moiré materials. The switching current density is significantly less than those reported in other platforms, suggesting moiré heterostructures are a suitable platform for efficient control of magnetic order.

Funding

United States Army Research Office, Award: W911NF-20-2-0166

Gordon and Betty Moore Foundation, Award: GBMF9471

United States Air Force Office of Scientific Research, Award: FA9550-19-1-0390

JSPS KAKENHI, Award: 19H05790

National Science Foundation of Sri Lanka, Award: DMR-1906325

National Science Foundation Graduate Research Fellowship Program, Award: 1650114

JSPS KAKENHI, Award: 20H00354

JSPS KAKENHI, Award: 21H05233