Experimental Realization of a Quantum Spin Pump

Details Experimental Realization of a Quantum Spin Pump Experimental Realization of a Quantum Spin Pump

2003-02-24

arxiv.org/abs/cond-mat/0302492v2

Phys. Rev. Lett. 91, 258301 (2003)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

related papers available at http://marcuslab.harvard.edu

Scientific paper

10.1103/PhysRevLett.91.258301

We demonstrate the operation of a quantum spin pump based on cyclic radio-frequency excitation of a GaAs quantum dot, including the ability to pump pure spin without pumping charge. The device takes advantage of bidirectional mesoscopic fluctuations of pumped current, made spin-dependent by the application of an in-plane Zeeman field. Spin currents are measured by placing the pump in a focusing geometry with a spin-selective collector.

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