Proposal for a correlation induced spin-current polarizer

Details Proposal for a correlation induced spin-current polarizer Proposal for a correlation induced spin-current polarizer

2007-11-22

arxiv.org/abs/0711.3566v2

Phys. Rev. B 77, 125331 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 4 figures, title changed, rearranged figures, one reference added, discussion extension, accepted for Phys. Rev. B

Scientific paper

10.1103/PhysRevB.77.125331

We propose a spin polarizer device composed of a quantum dot connected to the spin polarized leads. The spin control of the current flowing through the device is entirely due to the Coulomb interactions present inside the dot. We show that the initial polarization present in the source lead can be reverted or suppressed just by manipulating the gate voltage acting on the dot, the presence of the external magnetic field is not required. The influence of the temperature and finite bias on the efficiency of the current spin switching effect is also discussed.

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