2009/09/15 by J. P. Dahlhaus, Stefan A. Maier, S. Maier +1 · 1 citation
Engineering · Physics and Astronomy · #Advancements in Semiconductor Devices and Circuit Design #Quantum and electron transport phenomena #Semiconductor Quantum Structures and Devices #cond-mat.mes-hall #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.81.075110
published as Phys. Rev. B 81, 075110 (2010) · 5 pages, 5 figures (eps)
arxiv created 2009/09/15 · openalex publication_date 2010/02/16 · arxiv updated 2010/03/18 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
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.