Type of Publication: | Journal article |
Author: | Braun, Matthias; Burkard, Guido |
Year of publication: | 2008 |
Published in: | Physical Review Letters ; 101 (2008). - 36802 |
DOI (citable link): | https://dx.doi.org/10.1103/PhysRevLett.101.036802 |
Summary: |
We study dc charge and spin transport through a weakly coupled quantum dot, driven by a nonadiabatic periodic change of system parameters. We generalize the model of Tien and Gordon to simultaneously oscillating voltages and tunnel couplings. When applying our general result to the two-parameter charge pumping in quantum dots, we find interference effects between the oscillations of the voltage and tunnel couplings. We show that these interference effects may explain recent measurements in metallic islands. Furthermore, we discuss the possibility to electrically pump a spin current in presence of a static magnetic field.
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PACS Classification: | 73.23.Hk; 72.10.Bg; 72.25.Pn; 73.63.Kv |
Subject (DDC): | 530 Physics |
Bibliography of Konstanz: | Yes |
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BRAUN, Matthias, Guido BURKARD, 2008. Nonadiabatic Two-Parameter Charge and Spin Pumping in a Quantum Dot. In: Physical Review Letters. 101, 36802. Available under: doi: 10.1103/PhysRevLett.101.036802
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