Journal
PHYSICAL REVIEW LETTERS
Volume 85, Issue 9, Pages 1962-1965Publisher
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.85.1962
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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 it acts as an efficient spin filter (at the single-spin level), producing a spin-polarized current. Conversely, if the leads are fully spin polarized the up or the down state of the spin on the dot results in a large sequential or a small cotunneling current, and, thus, together with ESR techniques, the setup can be operated as a single-spin memory.
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