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Spin transport in mesoscopic rings with inhomogeneous spin-orbit coupling

Yaroslav Tserkovnyak·Arne Brataas
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Abstract

We revisit the problem of electron transport through mesoscopic rings with spin-orbit (SO) interaction. In the well-known path-integral approach, the scattering states for a quasi-1D ring with quasi-1D leads can be expressed in terms of spinless electrons subject to a fictitious magnetic flux. We show that spin-dependent quantum-interference effects in small rings are strongest for spatially inhomogeneous SO interactions, in which case spin currents can be controlled by a small external magnetic field. Mesoscopic spin Hall effects in four-terminal rings can also be understood in terms of the fictitious magnetic flux.

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Yaroslav Tserkovnyak, Arne Brataas. 2007-10-26. Spin transport in mesoscopic rings with inhomogeneous spin-orbit coupling. https://doi.org/10.1103/physrevb.76.155326

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