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Quantum Transport in Nonuniform Magnetic Fields: Aharonov-Bohm Ring as a Spin Switch

Diego Frustaglia·Martina Hentschel·Klaus Richter
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Abstract

We study the spin-dependent magneto conductance in mesoscopic rings subject to an inhomogeneous in-plane magnetic field. We show that the polarization direction of transmitted spin-polarized electrons can be controlled via an additional magnetic flux such that spin flips are induced at half a flux quantum. This quantum interference effect is independent of the strength of the nonuniform field applied. We give an analytical explanation for one-dimensional rings and numerical results for corresponding ballistic microstructures.

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Diego Frustaglia, Martina Hentschel, Klaus Richter. 2001-10-19. Quantum Transport in Nonuniform Magnetic Fields: Aharonov-Bohm Ring as a Spin Switch. https://doi.org/10.1103/physrevlett.87.256602

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