Kondo impurities in nanoscopic systems: new confinement-induced regimes

Details Kondo impurities in nanoscopic systems: new confinement-induced regimes Kondo impurities in nanoscopic systems: new confinement-induced regimes

2002-02-26

arxiv.org/abs/cond-mat/0202489v1

Phys. Rev. B 66, 115303 (2002)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevB.66.115303

We present results for Kondo impurities in nanoscopic systems. Using exact diagonalization in small clusters and Wilson's renormalization group we analyze an isolated system and a nanoscopic system weakly coupled to a macroscopic reservoir. In the latter case, new regimes not observed in macroscopic homogeneous systems are induced by the confinement of conduction electrons. These new confinement-induced regimes are very different depending on whether the Fermi energy coincides with the energy of a resonant state or lies between two quasi-bound states.

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