Mesoscopic effects in adiabatic spin pumping

Details Mesoscopic effects in adiabatic spin pumping Mesoscopic effects in adiabatic spin pumping

2003-05-30

arxiv.org/abs/cond-mat/0306001v2

Phys. Rev. Lett. v91 p166801 (2003)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 1 figure same as version 1. Added a comma to separate the two author names

Scientific paper

10.1103/PhysRevLett.91.166801

We show that temporal shape modulations (pumping) of a quantum dot in the presence of spin-orbital coupling lead to a finite dc spin current. Depending on the strength of the spin-orbit coupling, the spin current is polarized perpendicular to the plane of the two-dimensional electron gas, or has an arbitrary direction subject to mesoscopic fluctuations. We analyze the statistics of the spin and charge currents in the adiabatic limit for the full cross-over from weak to strong spin-orbit coupling.

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