Spin Fluctuation and Persistent Current in a Mesoscopic Ring Coupled to a Quantum Dot

Details Spin Fluctuation and Persistent Current in a Mesoscopic Ring Coupled to a Quantum Dot Spin Fluctuation and Persistent Current in a Mesoscopic Ring Coupled to a Quantum Dot

2000-11-13

arxiv.org/abs/cond-mat/0011215v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 2 figures

Scientific paper

10.1103/PhysRevB.64.033314

We investigate the persistent current influenced by the spin fluctuations in a mesoscopic ring weakly coupled to a quantum dot. It is shown that the Kondo effect gives rise to some unusual features of the persistent current in the limit where the charge transfer between two subsystems is suppressed. Various aspects of the crossover from a delocalized to a localized dot limit are discussed in relation with the effect of the coherent response of the Kondo cloud to the Aharonov-Bohm flux.

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