Mesoscopic Fano Effect in a Quantum Dot Embedded in an Aharonov-Bohm Ring

Details Mesoscopic Fano Effect in a Quantum Dot Embedded in an Aharonov-Bohm Ring Mesoscopic Fano Effect in a Quantum Dot Embedded in an Aharonov-Bohm Ring

2003-09-25

arxiv.org/abs/cond-mat/0309570v4

Phys. Rev. B68, 235304 (2003)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

REVTEX, 9 pages including 8 figures

Scientific paper

10.1103/PhysRevB.68.235304

The Fano effect, which occurs through the quantum-mechanical cooperation between resonance and interference, can be observed in electron transport through a hybrid system of a quantum dot and an Aharonov-Bohm ring. While a clear correlation appears between the height of the Coulomb peak and the real asymmetric parameter $q$ for the corresponding Fano lineshape, we need to introduce a complex $q$ to describe the variation of the lineshape by the magnetic and electrostatic fields. The present analysis demonstrates that the Fano effect with complex asymmetric parameters provides a good probe to detect a quantum-mechanical phase of traversing electrons.

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