Department of Physics and Astronomy: Publications and Other Research
ORCID IDs
Belashchenko 0000-0002-8518-1490
Baez Flores 0009-0001-6137-989X
Fang 0000-0003-2873-0120
Kovalev 0000-0002-5884-7154
van Schilfgaarde 0000-0003-1210-4459
Haney 0000-0001-9390-4727
Stiles 0000-0001-8238-4156
Date of this Version
10-25-2023
Citation
Physical Review B (2023) 108: 144433
doi: 10.1103/PhysRevB.108.144433
Abstract
Spin-accumulation and spin-current profiles are calculated for a disordered Pt film subjected to an in-plane electric current within the nonequilibrium Green's function approach. In the bulklike region of the sample, this approach captures the intrinsic spin Hall effect found in other calculations. Near the surfaces, the results reveal qualitative differences with the results of the widely used spin-diffusion model, even when the boundary conditions are modified to try to account for them. One difference is that the effective spin-diffusion length for transverse spin transport is significantly different from its longitudinal counterpart and is instead similar to the mean-free path. This feature may be generic for spin currents generated via the intrinsic spin Hall mechanism because of the differences in transport mechanisms compared to longitudinal spin transport. Orbital accumulation in the Pt film is only significant in the immediate vicinity of the surfaces and has a small component penetrating into the bulk only in the presence of spin-orbit coupling, as a secondary effect induced by the spin accumulation.
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Comments
United States government work