Pumping spin with electrical fields

Details Pumping spin with electrical fields Pumping spin with electrical fields

2002-11-11

arxiv.org/abs/cond-mat/0211211v2

Phys. Rev. B 68, 155324 (2003)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 2 figures; minor changes, typos corrected

Scientific paper

10.1103/PhysRevB.68.155324

Spin currents can be obtained through adiabatic pumping by means of electrical gating only. This is possible by making use of the tunability of the Rashba spin-orbit coupling in semiconductor heterostructures. We demonstrate the principles of this effect by considering a single-channel wire with a constriction. We also consider realistic structures, consisting of several open channels where subband spin-mixing and disorder are present, and we confirm our predictions. Two different ways to detect the spin-pumping effect, either using ferromagnetic leads or applying a magnetic field, are discussed.

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