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Spin Filter Effects in Mesoscopic Ring Structures

Markus Popp·Diego Frustaglia·Klaus Richter
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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.

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Markus Popp, Diego Frustaglia, Klaus Richter. 2003-01-07. Spin Filter Effects in Mesoscopic Ring Structures. https://doi.org/10.1088/0957-4484%2F14%2F2%2F347

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