Spin can be generated from the charge current. Important mechanisms for this charge-spin conversion are the spin Hall effect, orbital Hall effect, and topological effect. When the generated spin is transferred to a ferromagnet, it can rotate the magnetization via spin-orbit torque.
An Electric field on non-magnetic materials can induce a transverse flow of spin or orbital of electrons, which is called the spin Hall effect and orbital Hall effect. Employing these effects, we can efficiently generate spin from charge current.
Related works:
Orbital Hall effect in Ti: http://arxiv.org/abs/2109.14847
Spin Hall effect in quantum well: https://doi.org/10.1103/PhysRevB.104.184412
Spin-momentum locking of the topologically non-trivial materials can convert the charge current into the spin polarization on the surface. We investigate the spin polarization on the topological surface and spin transport across the interface of heterostructures.
Related works:
Nonlinear optical Hall effect in WTe2: http://arxiv.org/abs/2103.08173
Spin-momentum locking of the topologically non-trivial materials can convert the charge current into the spin polarization on the surface. We investigate the spin polarization on the topological surface and spin transport across the interface of heterostructures.
Related works:
Time-resolved measurement of spin-orbit torque: https://doi.org/10.1063/5.0055458
Magnetization dynamics of antiferromagnet by spin-transfer torque: https://doi.org/10.1063/5.0054502
