Experimental Realization of a Quantum Spin Pump

Susan  Watson; R.  Potok; C. M. Marcus; V. Umansky

doi:10.1103/PhysRevLett.91.258301

Experimental Realization of a Quantum Spin Pump

Susan Watson, R. Potok, C. M. Marcus, V. Umansky

258 Citationer (Scopus)

1376 Downloads (Pure)

Abstract

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.

Originalsprog	Udefineret/Ukendt
Tidsskrift	Physical Review Letters
Vol/bind	91
Udgave nummer	25
Sider (fra-til)	258301
Antal sider	4
ISSN	0031-9007
DOI	https://doi.org/10.1103/PhysRevLett.91.258301
Status	Udgivet - 24 feb. 2003

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10.1103/PhysRevLett.91.258301

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Citationsformater

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AB - 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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