DOI: 10.1063/1.2710794. Electrical detection of spin currents: The spin-current induced Hall effect (invited)

Electrical detection of spin currents: The spin-current induced Hall effect (invited)

10.1063/1.2710794

Crossref journal-article

AIP Publishing

Journal of Applied Physics (317)

Abstract

We demonstrate electrical detection of spin currents in metallic nanostructures. In a conductor with nonzero spin-orbit coupling, a spin current is predicted in a direction perpendicular to the applied electric field, giving rise to a spin Hall effect, where electrons with opposite spin orientations accumulate at opposite edges of the sample. Conversely, when a spin current is present, a charge imbalance is expected, following the Onsager reciprocal relations between spin and charge currents. We report direct electronic measurements of this effect in a lateral geometry by using a ferromagnetic electrode in combination with a tunnel barrier to inject a spin-polarized current in a paramagnetic conductor. We observe a laterally induced voltage in the latter that results from the conversion of the injected spin current into charge imbalance owing to the spin-orbit coupling. Such a voltage is proportional to the component of the injected spins that is perpendicular to the plane defined by the spin-current direction and the voltage probes. By using this technique in CoFe–Al2O3–Al devices, we determine the spin Hall conductivity of aluminum.

Bibliography

Valenzuela, S. O., & Tinkham, M. (2007). Electrical detection of spin currents: The spin-current induced Hall effect (invited). Journal of Applied Physics, 101(9).

Authors 2

S. O. Valenzuela (first)
M. Tinkham (additional)

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Dates

Type	When
Created	18 years, 4 months ago (April 26, 2007, 6:03 p.m.)
Deposited	2 years, 2 months ago (June 23, 2023, 3 a.m.)
Indexed	1 week, 6 days ago (Aug. 23, 2025, 9:20 p.m.)
Issued	18 years, 4 months ago (April 26, 2007)
Published	18 years, 4 months ago (April 26, 2007)
Published Online	18 years, 4 months ago (April 26, 2007)
Published Print	18 years, 4 months ago (May 1, 2007)

Funders 0

None

BibTeX

@article{Valenzuela_2007, title={Electrical detection of spin currents: The spin-current induced Hall effect (invited)}, volume={101}, ISSN={1089-7550}, url={http://dx.doi.org/10.1063/1.2710794}, DOI={10.1063/1.2710794}, number={9}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Valenzuela, S. O. and Tinkham, M.}, year={2007}, month=apr }

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