Swapping of spin currents: interchanging spin and flow directions

Abstract

We introduce a previously unknown spin-related transport phenomenon, consisting in a transformation (swapping) of spin currents, in which the spin direction and the direction of flow are interchanged. Swapping is due to the spin-orbit interaction in scattering. It originates from the correlation between the spin rotation and the scattering angle. This effect is more robust than the skew scattering, since it exists already in the first Born approximation. Swapping may lead to the spin accumulation with spin polarization perpendicular to the surface, unlike what happens in the spin Hall effect.

5 pages, 2 figures. Minor changes corresponding to the published version, title changed, Appendix added

References in corpus (4)

• Dissipationless Quantum Spin Current at Room Temperature
• Experimental observation of the spin-Hall effect in a two dimensional spin-orbit coupled semiconductor system
• Semiclassical theories of the anomalous Hall effect
• Magnetoresistance due to edge spin accumulation

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• Extrinsic Spin-Charge Coupling in Diffusive Superconducting Systems
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• Onsager Relations between Spin Currents and Charge Currents