Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2000-03-06
Phys. Rev. Lett. 85, 1962 (2000)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
4 pages, 3 figures, REVTeX
Scientific paper
10.1103/PhysRevLett.85.1962
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.
Loss Daniel
Recher Patrik
Sukhorukov Eugene V.
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