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

Abstract

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.

5 pages, 4 figures

References in corpus (5)

• Manipulation of a single charge in a double quantum dot
• Zeeman energy and spin relaxation in a one-electron quantum dot
• Semiconductor few-electron quantum dot operated as a bipolar spin filter
• Pumped spin-current and shot noise spectra in a single quantum dot
• Adiabatic spin pumping through a quantum dot with a single orbital level

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