Kondo spin splitting in quantum dots with ferromagnetic leads
The splitting of the Kondo Resonance (KR) in a quantum dot (QD) connected to ferromagnetic leads is studied using a new Slave Boson formulation. We show that the KR is splitted into two resonances out of the Fermi level. The splitting can be controlled by the application of a magnetic field in the Q...
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Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_18626351_v3_n11_p3778_AguiarHualde |
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todo:paper_18626351_v3_n11_p3778_AguiarHualde2023-10-03T16:33:25Z Kondo spin splitting in quantum dots with ferromagnetic leads Aguiar Hualde, J.M. Chiappe, G. Anda, E.V. Ferromagnetic leads International conferences Kondo resonances Magnetic leads Quantum Dot Quantum dots Spin transports Spin-splitting Electric conductivity Electric currents Fermi level Fermions Ferromagnetic materials Ferromagnetism Krypton Magnetic field measurement Magnetic fields Magnetic materials Optical waveguides Quantum electronics Resonance Semiconductor materials Spin dynamics Semiconductor quantum dots The splitting of the Kondo Resonance (KR) in a quantum dot (QD) connected to ferromagnetic leads is studied using a new Slave Boson formulation. We show that the KR is splitted into two resonances out of the Fermi level. The splitting can be controlled by the application of a magnetic field in the QD. While this magnetic field does not modify the magnetism of the leads, it can restore the KR at the Fermi level. When the magnetization is strong enough, it's not possible to recover the KR. In addition, selective spin transport across the QD can be achieved by tuning the magnetic field. This effect is a consequence of the asymmetric Kondo splitting produced by the magnetic leads. © 2006 WILEY-VCH Verlag GmbH & Co. KGaA. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_18626351_v3_n11_p3778_AguiarHualde |
institution |
Universidad de Buenos Aires |
institution_str |
I-28 |
repository_str |
R-134 |
collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
topic |
Ferromagnetic leads International conferences Kondo resonances Magnetic leads Quantum Dot Quantum dots Spin transports Spin-splitting Electric conductivity Electric currents Fermi level Fermions Ferromagnetic materials Ferromagnetism Krypton Magnetic field measurement Magnetic fields Magnetic materials Optical waveguides Quantum electronics Resonance Semiconductor materials Spin dynamics Semiconductor quantum dots |
spellingShingle |
Ferromagnetic leads International conferences Kondo resonances Magnetic leads Quantum Dot Quantum dots Spin transports Spin-splitting Electric conductivity Electric currents Fermi level Fermions Ferromagnetic materials Ferromagnetism Krypton Magnetic field measurement Magnetic fields Magnetic materials Optical waveguides Quantum electronics Resonance Semiconductor materials Spin dynamics Semiconductor quantum dots Aguiar Hualde, J.M. Chiappe, G. Anda, E.V. Kondo spin splitting in quantum dots with ferromagnetic leads |
topic_facet |
Ferromagnetic leads International conferences Kondo resonances Magnetic leads Quantum Dot Quantum dots Spin transports Spin-splitting Electric conductivity Electric currents Fermi level Fermions Ferromagnetic materials Ferromagnetism Krypton Magnetic field measurement Magnetic fields Magnetic materials Optical waveguides Quantum electronics Resonance Semiconductor materials Spin dynamics Semiconductor quantum dots |
description |
The splitting of the Kondo Resonance (KR) in a quantum dot (QD) connected to ferromagnetic leads is studied using a new Slave Boson formulation. We show that the KR is splitted into two resonances out of the Fermi level. The splitting can be controlled by the application of a magnetic field in the QD. While this magnetic field does not modify the magnetism of the leads, it can restore the KR at the Fermi level. When the magnetization is strong enough, it's not possible to recover the KR. In addition, selective spin transport across the QD can be achieved by tuning the magnetic field. This effect is a consequence of the asymmetric Kondo splitting produced by the magnetic leads. © 2006 WILEY-VCH Verlag GmbH & Co. KGaA. |
format |
JOUR |
author |
Aguiar Hualde, J.M. Chiappe, G. Anda, E.V. |
author_facet |
Aguiar Hualde, J.M. Chiappe, G. Anda, E.V. |
author_sort |
Aguiar Hualde, J.M. |
title |
Kondo spin splitting in quantum dots with ferromagnetic leads |
title_short |
Kondo spin splitting in quantum dots with ferromagnetic leads |
title_full |
Kondo spin splitting in quantum dots with ferromagnetic leads |
title_fullStr |
Kondo spin splitting in quantum dots with ferromagnetic leads |
title_full_unstemmed |
Kondo spin splitting in quantum dots with ferromagnetic leads |
title_sort |
kondo spin splitting in quantum dots with ferromagnetic leads |
url |
http://hdl.handle.net/20.500.12110/paper_18626351_v3_n11_p3778_AguiarHualde |
work_keys_str_mv |
AT aguiarhualdejm kondospinsplittinginquantumdotswithferromagneticleads AT chiappeg kondospinsplittinginquantumdotswithferromagneticleads AT andaev kondospinsplittinginquantumdotswithferromagneticleads |
_version_ |
1782023893514452992 |