Monday, July 15, 2013

1307.3416 (C. P. Moca et al.)

Fermi liquid theory of resonant spin pumping    [PDF]

C. P. Moca, A. Alex, A. Shnirman, G. Zarand
We study resonant all-electric adiabatic spin pumping through a quantum dot with two nearby levels by using a Fermi liquid approach in the strongly interacting regime, combined with a projective numerical renormalization group (NRG) theory. Due to spin-orbit coupling, a strong spin pumping resonance emerges at every charging transition, which allows for the transfer of a spin ~ \hbar/2 through the device in a single pumping cycle. Depending on the precise geometry of the device, controlled pure spin pumping is also possible.
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