Kondo effect and spin filtering in coupled quantum dots

The coherent transport through a set of N coupled quantum dots is considered in the limit of infinite intradot and finite or infinite interdot interactions. The mean field slave boson approach and the equation of motion method are used. For the full spin–orbit degenerate case the low energy behavior...

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Bibliographic Details
Published inJournal of alloys and compounds Vol. 423; no. 1; pp. 215 - 219
Main Authors Lipiński, S., Krychowski, D.
Format Journal Article Conference Proceeding
LanguageEnglish
Published Lausanne Elsevier B.V 26.10.2006
Elsevier
Subjects
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Electronic transport in condensed matter
Electronic transport in nanoscopic systems
Exact sciences and technology
Kondo effect
Physics
Spin polarized transport
Electronic transport in nanoscopic systems
Kondo effect
Mean field approximation
Electron correlations
Quantum dots
Magnetic field effects
Spin-orbit interactions
Boson field
SU groups
Equations of motion
Spin filter
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Summary:The coherent transport through a set of N coupled quantum dots is considered in the limit of infinite intradot and finite or infinite interdot interactions. The mean field slave boson approach and the equation of motion method are used. For the full spin–orbit degenerate case the low energy behavior is characterized by an SU(2N) symmetry with entangled spin and charge correlations. The magnetic field breaks the spin degeneracy, but for the special choices of gate voltages the degeneracy might be recovered in one spin channel allowing the spin filtering.
Bibliography:SourceType-Scholarly Journals-2
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ObjectType-Conference Paper-1
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SourceType-Conference Papers & Proceedings-1
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ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2005.12.099