AC-driven double quantum dots as spin pumps and spin filters

Details AC-driven double quantum dots as spin pumps and spin filters AC-driven double quantum dots as spin pumps and spin filters

2005-02-18

arxiv.org/abs/cond-mat/0502440v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.94.107202

We propose and analyze a new scheme of realizing both spin filtering and spin pumping by using ac-driven double quantum dots in the Coulomb blockade regime. By calculating the current through the system we demonstrate that the spin polarization of the current can be controlled by tuning the parameters (amplitude and frequency) of the ac field. We also discuss spin relaxation and decoherence effects in the pumped current.

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