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Adiabatic pumping in the mixed-valence and Kondo regimes

We investigate adiabatic pumping through a quantum dot with a single level in the mixed-valence and Kondo regimes using the slave boson mean field approximation. The pumped current is driven by a gauge potential due to time-dependent tunneling barriers as well as by the modulation of the Friedel pha...

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Bibliographic Details
Published in:Physical review letters 2004-09, Vol.93 (11), p.116601.1-116601.4, Article 116601
Main Author: AONO, Tomosuke
Format: Article
Language:English
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Summary:We investigate adiabatic pumping through a quantum dot with a single level in the mixed-valence and Kondo regimes using the slave boson mean field approximation. The pumped current is driven by a gauge potential due to time-dependent tunneling barriers as well as by the modulation of the Friedel phase. The sign of the former contribution depends on the strength of the Coulomb interaction. Under finite magnetic fields, the separation of the spin and charge currents peculiar to the Kondo effect occurs.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.93.116601