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Spin transport in mesoscopic rings with inhomogeneous spin-orbit coupling
Yaroslav Tserkovnyak, Arne Brataas
Published 2006-11-03, updated 2007-10-26Version 2
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.
Comments: 5 pages, 2 figures
Journal: Phys. Rev. B 76 (2007) 155326
Categories: cond-mat.mes-hall
Keywords: mesoscopic rings, inhomogeneous spin-orbit coupling, spin transport, fictitious magnetic flux, mesoscopic spin hall effects
Tags: journal article
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