Persistent currents through a quantum dot

Details Persistent currents through a quantum dot Persistent currents through a quantum dot

2001-03-07

arxiv.org/abs/cond-mat/0103175v1

Physics

Condensed Matter

Strongly Correlated Electrons

33 pages, RevTex, 8 postscript figures

Scientific paper

10.1103/PhysRevB.64.085308

We study the persistent currents induced by the Aharonov-Bohm effect in a closed ring which either embeds or is directly side coupled to a quantum dot at Kondo resonance. We predict that in both cases, the persistent current is very sensitive to the ratio between the length of the ring and the size of the Kondo screening cloud which appears as a fundamental prediction of scaling theories of the Kondo effect. Persistent current measurements provide therefore an opportunity to detect this cloud which has so far never been observed experimentally.

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