Quantum Dot as Spin Filter and Spin Memory
Mesoscale and Nanoscale Physics
2009-10-31 v1
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.
Cite
@article{arxiv.cond-mat/0003089,
title = {Quantum Dot as Spin Filter and Spin Memory},
author = {Patrik Recher and Eugene V. Sukhorukov and Daniel Loss},
journal= {arXiv preprint arXiv:cond-mat/0003089},
year = {2009}
}
Comments
4 pages, 3 figures, REVTeX