Regensburg 2010 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 33: TR: Nanoelectronics I: Quantum Dots, Wires, Point Contacts 2

TT 33.15: Talk

Thursday, March 25, 2010, 17:45–18:00, H19

Generation and detection of spin-polarized currents via double quantum dot structures — •Stefan Maier¹, Jan P. Dahlhaus^1,2, and Andreas Komnik¹ — ¹Ruprecht-Karls-Universität Heidelberg, Philosophenweg 19, 69120 Heidelberg, Germany — ²Instituut-Lorentz, Universiteit Leiden, P.O. Box 9506, 2300 RA Leiden, The Netherlands

We propose a setup for generation and detection of spin-polarized currents. The structure we use is a double quantum dot with parallel topology. The filtering mechanism is based on the anti-resonance structure in the transmission coefficient. We show that the device remains fully operable also in the case of not too strong inter- as well as intradot electronic correlations. We discuss how the coupling asymmetry and finite temperature may affect the efficiency of the device and present estimations for the relevant device parameters necessary for its experimental realization.