Spin current generation and detection by a double quantum dot structure

Details Spin current generation and detection by a double quantum dot structure Spin current generation and detection by a double quantum dot structure

2009-09-15

arxiv.org/abs/0909.2762v1

Phys. Rev. B 81, 075110 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 5 figures (eps)

Scientific paper

10.1103/PhysRevB.81.075110

We propose a device acting as a spin valve which is based on a double quantum dot structure with parallel topology. Using the exact analytical solution for the noninteracting case we argue that, at a certain constellation of system parameters and externally applied fields, the electric current through the constriction can become almost fully spin-polarized. We discuss the influence of the coupling asymmetry, finite temperatures and interactions on the efficiency of the device and make predictions for the experimental realization of the effect.

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