2002/10/31 by Karyn Le Hur, Pascal Simon
Physics and Astronomy · #Magnetic properties of thin films #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #cond-mat.mes-hall #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.67.201308
published as PRB 67, R201308 2003 · 4 pages, 1 figure, final version for PRB Rapid Comm
arxiv created 2003/04/03 · openalex publication_date 2003/05/20 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We investigate the charge fluctuations of a grain 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 results 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.