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28 March 2024
 
  » arxiv » arxiv.0704.3212

 Article overview


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)
AbstractWe 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
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