Coherent Transport through a Quantum Dot Embedded in an Aharonov-Bohm Ring

Details Coherent Transport through a Quantum Dot Embedded in an Aharonov-Bohm Ring Coherent Transport through a Quantum Dot Embedded in an Aharonov-Bohm Ring

1998-11-25

arxiv.org/abs/cond-mat/9811354v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages Revtex, 4 Postscript figures, accepted for publication in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.59.4608

We study the coherent transport in multi-terminal mesoscopic Aharonov-Bohm ring with a quantum dot embedded in an arm. Employing the Friedel sum rule for the effective single-particle levels in the quantum dot, we explain some anomalous features which have been observed in the experiment. We attribute these anomalies to the result of nontrivial quantum interference of the quantum dot with the attached ring. Further, we propose a new feature of conductance oscillations which can be a test for the validity of our model.

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