Spin transport in mesoscopic rings with inhomogeneous spin-orbit coupling

Details Spin transport in mesoscopic rings with inhomogeneous spin-orbit coupling Spin transport in mesoscopic rings with inhomogeneous spin-orbit coupling

2006-11-03

arxiv.org/abs/cond-mat/0611086v2

Phys. Rev. B 76 (2007) 155326

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 2 figures

Scientific paper

10.1103/PhysRevB.76.155326

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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