Spin-charge filtering through a spin-orbit coupled quantum dot controlled via an Aharonov-Bohm interferometer

Abstract

We show that a strongly correlated quantum dot embedded in an Aharonov-Bohm interferometer can 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 controls the many-body effects on the quantum dot. When the quantum dot is in the Kondo regime the flow of charge through the system can be tuned by the phase of the Aharonov-Bohm arm, ${\varphi }_{AB}$. Furthermore when a spin-orbit interaction is present on a Kondo quantum dot we can control the flow of spin by the spin-orbit phase, ${\varphi }_{SO}$. 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.

8 pages, 10 figures

References in corpus (10)

• Tuning of the Fano Effect through a Quantum Dot in an Aharonov-Bohm Interferometer
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• Quantum transport theory for nanostructures with Rashba spin-orbital interaction
• Kondo Correlations and the Fano Effect in Closed AB-Interferometers
• Fano Resonance in a Quantum Wire with a Side-coupled Quantum Dot
• Observation of the Fano-Kondo Anti-Resonance in a Quantum Wire with a Side-Coupled Quantum Dot
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• Fano resonance in crossed carbon nanotubes
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Cited by in corpus (9)

• Engineering the Kondo and Fano effects in double quantum dots
• Kondo screening suppression by spin-orbit interaction in quantum dots
• Kondo effect in spin-orbit mesoscopic interferometers
• Decoupling and antiresonance in electronic transport through a quantum dot chain embodied in an Aharonov-Bohm interferometer
• Spin selective transport through Aharonov-Bohm and Aharonov-Casher triple quantum dot systems
• Rashba-induced transverse pure spin currents in a four-terminal quantum dot ring
• Detection of spin bias in four-terminal quantum-dot ring
• Spin interference and Fano effect in electron transport through a mesoscopic ring side-coupled with a quantum dot
• Spin Current Generation as a Nonequilibrium Kondo Effect in a Spin-orbit Mesoscopic Interferometer