Parasitic pumping currents in an interacting quantum dot

Details Parasitic pumping currents in an interacting quantum dot Parasitic pumping currents in an interacting quantum dot

2010-10-06

arxiv.org/abs/1010.1134v1

Phys. Rev. B 82, 165321 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1103/PhysRevB.82.165321

We analyze the charge and spin pumping in an interacting dot within the almost adiabatic limit. By using a non-equilibrium Green's function technique within the time-dependent slave boson approximation, we analyze the pumped current in terms of the dynamical constraints in the infinite-U regime. The results show the presence of parasitic pumping currents due to the additional phases of the constraints. The behavior of the pumped current through the quantum dot is illustrated in the spin-insensitive and in the spin-sensitive case relevant for spintronics applications.

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