2003/11/30 by Tomosuke Aono
Physics and Astronomy · #cond-mat.mes-hall #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.93.116601
published as Phys. Rev. Lett. 93, 116601 (2004) · RevTeX, 4+pages, 4 figures, textual improvement
arxiv created 2004/07/19 · arxiv updated 2009/12/01
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.