Dresden 2011 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
TT: Fachverband Tiefe Temperaturen
TT 38: Poster Session Transport
TT 38.20: Poster
Mittwoch, 16. März 2011, 14:00–18:00, P3
Adiabatic pumping through an interacting quantum dot with spin-orbit coupling — •Stephan Rojek1, Jürgen König1, and Alexander Shnirman2 — 1Theoretische Physik, Universität Duisburg-Essen and CeNIDE, 47048 Duisburg, Germany — 2Institut für Theorie der Kondensierten Materie and DFG-Center for Functional Nanostructures (CFN), Universität Karlsruhe, 76128 Karlsruhe, Germany
We study adiabatic pumping through a two-level quantum dot coupled to two normal leads in the presence of spin-orbit coupling. The variation of the two energy levels of the dot periodically in time leads to finite charge and spin currents. We calculate the pumped charge and spin using a diagrammatic real-time approach. Going beyond the case of noninteracting electrons on the quantum dot [1], we study the situation of finite Coulomb-interaction. For comparison, we show results for the limits of noninteracting and strongly interacting electrons. In both limits spin-orbit coupling provides the possibility for pure spin current. Furthermore, we discuss differences between the charge and spin transport characteristics.
[1] V. Brosco et al., Phys. Rev. B 82, 041309(R) (2010).