Non-adiabatic two-parameter charge and spin pumping in a quantum dot
arXiv:0801.4925 · doi:10.1103/PhysRevLett.101.036802
Abstract
We study DC charge and spin transport through a weakly coupled quantum dot, driven by a non-adiabatic 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. Furthermore, we discuss the possibility to electrically pump a spin current in presence of a static magnetic field.
4.1 pages, 4 figures
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