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Article overview
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Spin-charge filtering through a spin-orbit coupled quantum dot
controlled via an Aharonov-Bohm interferometer | R. J. Heary
; J. E. Han
; Lingyin Zhu
; | Date: |
24 Apr 2007 | Subject: | Strongly Correlated Electrons (cond-mat.str-el); Mesoscopic Systems and Quantum Hall Effect (cond-mat.mes-hall) | Abstract: | We show that a strongly correlated quantum dot embedded in an Aharonov-Bohm
interferometer may be used to filter both charge and spin at zero voltage bias.
The magnitude with which the Aharonov-Bohm arm is coupled to the system
effectively controls the strength of the local many-body interaction on the
quantum dot. When the quantum dot is in the Kondo regime the flow of charge
through the system may be controlled by tuning the phase of the Aharonov-Bohm
arm, $phi_{AB}$. Furthermore when a spin-orbit interaction is present on a
Kondo quantum dot we may control the flow of spin by the spin-orbit phase,
$phi_{SO}$. The existence of the Kondo peak at the Fermi energy makes it
possible to control the flow of both charge and spin in the zero voltage bias
limit. | Source: | arXiv, arxiv.0704.3212 | Services: | Forum | Review | PDF | Favorites |
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