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Quantum rings as electron spin beam splitters

Peter Foldi, Orsolya Kalman, Mihaly G. Benedict, F. M. Peeters

cond-mat.mes-hallarXiv:cond-mat/0507650

Abstract

Quantum interference and spin-orbit interaction in a one-dimensional mesoscopic semiconductor ring with one input and two output leads can act as a spin beam splitter. Different polarization can be achieved in the two output channels from an originally totally unpolarized incoming spin state, very much like in a Stern-Gerlach apparatus. We determine the relevant parameters such that the device has unit efficiency.

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