Smearing of charge fluctuations in a grain by spin-flip assisted tunneling
arXiv:cond-mat/0210342 · doi:10.1103/PhysRevB.67.201308
Abstract
We investigate the charge fluctuations of a grain (large dot) coupled to a lead via a small quantum dot in the Kondo regime. We show that the strong entanglement of charge and spin flips in this setup can result in a stable SU(4) Kondo fixed point, which considerably smears out the Coulomb staircase behavior already in the weak tunneling limit. This behavior is robust enough to be experimentally observable.
arXiv comment4 pages, 1 figure, final version for PRB Rapid Comm
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