Spin Filter Effects in Mesoscopic Ring Structures

Abstract

We study the spin-dependent conductance of ballistic mesoscopic ring systems in the presence of an inhomogeneous magnetic field. We show that, for the setup proposed, even a small Zeeman splitting can lead to a considerable spin polarisation of the current. Making use of a spin-switch effect predicted for such systems we propose a device of two rings connected in series that in principle allows for both creating and coherently controlling spin polarized currents at low temperatures.

arXiv comment5 pages, 8 figures

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• Aharonov-Bohm Oscillations with Spin: Evidence for Berry's Phase
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• Aharonov-Bohm Physics with Spin II: Spin-Flip Effects in Two-dimensional Ballistic Systems
• Spin-dependent quantum transport in periodic magnetic modulations: Aharonov-Bohm ring structure as a spin filter
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• Topological insulator ring with magnetic impurities
• Spin-dependent hole quantum transport in Aharonov-Bohm ring structure: possible schemes for spin filter
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• Theory of spin polarization in mesoscopic spin-orbit coupling systems
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• Isotropic All-electric Spin analyzer based on a quantum ring with spin-orbit coupling
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• Localized states in a semiconductor quantum ring with a tangent wire
• Time-resolved quantum spin transport through an Aharonov-Casher ring