Quantum Dot as Spin Filter and Spin Memory

Details Quantum Dot as Spin Filter and Spin Memory Quantum Dot as Spin Filter and Spin Memory

2000-03-06

arxiv.org/abs/cond-mat/0003089v1

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.

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