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Photon-assisted tunneling in ac driven double quantum dot spin pumps

✍ Scribed by Sánchez, R. ;Platero, G. ;Aguado, R. ;Cota, E.

Publisher
John Wiley and Sons
Year
2006
Tongue
English
Weight
659 KB
Volume
203
Category
Article
ISSN
0031-8965

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✦ Synopsis

Abstract

In this work, we study the effect of an applied ac gate voltage on the spin filtering and pumping properties of a lateral double quantum dot, in the Coulomb blockade and weak coupling regimes, considering not only the effect of the ac potential on the inter‐dot tunneling but also on the tunneling through the leads. This last effect accounts for additional photon absorption and emission processes and therefore affects the spin polarization of the pumped current. In particular, we find that the spin down filtering property can be affected depending on the intensity of the ac field. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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