Persistent current on a disordered mesoscopic ring with an embedded quantum dot

Details Persistent current on a disordered mesoscopic ring with an embedded quantum dot Persistent current on a disordered mesoscopic ring with an embedded quantum dot

2005-12-28

arxiv.org/abs/cond-mat/0512684v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 4 figures

Scientific paper

We calculate the ensemble averaged persistent current on disordered mesoscopic rings with an embedded quantum dot. We model the quantum dot as a single resonance and use Random Matrix Theory to model the impurities in the ring. Using Efetov's supersymmetry technique, we develop an analytical expression for the current. We find not only one, but two resonance peaks in the current. This is interpreted as quantum interference phenomenon.

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