Experimental Realization of a Quantum Spin Pump
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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.
Original language | Undefined/Unknown |
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Journal | Physical Review Letters |
Volume | 91 |
Issue number | 25 |
Pages (from-to) | 258301 |
Number of pages | 4 |
ISSN | 0031-9007 |
DOIs | |
Publication status | Published - 24 Feb 2003 |
- cond-mat.mes-hall
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