Spin Filter Effects in Mesoscopic Ring Structures

Details Spin Filter Effects in Mesoscopic Ring Structures Spin Filter Effects in Mesoscopic Ring Structures

2003-01-07

arxiv.org/abs/cond-mat/0301064v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 8 figures

Scientific paper

10.1088/0957-4484/14/2/347

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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