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Quantum Dot as Spin Filter and Spin Memory

Patrik Recher·Eugene V. Sukhorukov·Daniel Loss
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Abstract

We consider a quantum dot in the Coulomb blockade regime weakly coupled to current leads and show that in the presence of a magnetic field the dot acts as an efficient spin-filter (at the single-spin level) which produces a spin-polarized current. Conversely, if the leads are fully spin-polarized the up or down state of the spin on the dot results in a large sequential or small cotunneling current, and thus, together with ESR techniques, the setup can be operated as a single-spin memory.

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Patrik Recher, Eugene V. Sukhorukov, Daniel Loss. 2000-03-06. Quantum Dot as Spin Filter and Spin Memory. https://doi.org/10.1103/physrevlett.85.1962

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