Pumping Spin and Charge Currents from Applying a Time-Variant Field and a Magnetic Field to a Quantum Dot

Abstract:

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Photon-electron pumping effects on a quantum dot connected to two magnetic leads in the presence of both via-dot and over-dot tunneling channels have been investigated by the evolution operator approach. It is found that a time-variant field applied to the quantum dot may give rise to charge and spin pumping at zero bias voltage for asymmetric magnetic junctions. When the magnetic field switch on,the spin-up and spin-down current can be considerably separated,then the highly spin polarized current is also generated.

Info:

Periodical:

Key Engineering Materials (Volumes 480-481)

Edited by:

Yanwen Wu

Pages:

1446-1451

DOI:

10.4028/www.scientific.net/KEM.480-481.1446

Citation:

J. M. Yao "Pumping Spin and Charge Currents from Applying a Time-Variant Field and a Magnetic Field to a Quantum Dot", Key Engineering Materials, Vols. 480-481, pp. 1446-1451, 2011

Online since:

June 2011

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Price:

$35.00

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