Phys. Rev. Lett. 89, 146802 (2002) [4 pages]Adiabatic Quantum Pump of Spin-Polarized CurrentReceived 10 December 2001; published 16 September 2002 We propose a mechanism by which an open quantum dot driven by two ac (radio frequency) gate voltages in the presence of a moderate in-plane magnetic field generates a spin-polarized, phase-coherent dc current. The idea combines adiabatic, nonquantized (but coherent) pumping through periodically modulated external parameters and the strong fluctuations of the electron wave function existent in chaotic cavities. We estimate that the spin polarization of the current can be observed for temperatures and Zeeman splitting energies of the order of the single-particle mean level spacing. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.89.146802
DOI:
10.1103/PhysRevLett.89.146802
PACS:
73.23.–b, 72.10.Bg
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