Measuring the Kondo effect in the Aharonov-Bohm interferometer

Abstract

The conductance $\mathcal{G}$ of an Aharonov-Bohm interferometer (ABI), with a strongly correlated quantum dot on one arm, is expressed in terms of the dot Green function, $G_{dd}$, the magnetic flux $\varphi$ and the non-interacting parameters of the ABI. We show that one can extract $G_{dd}$ from the observed oscillations of $\mathcal{G}$ with $\varphi$, for both closed and open ABI's. In the latter case, the phase shift $\beta$ deduced from $\mathcal{G}\approx A+B\cos (\varphi +\beta )$ depends strongly on the ABI's parameters, and usually $\beta \ne \pi /2$. These parameters may also reduce the Kondo temperature, eliminating the Kondo behavior.

References in corpus (2)

• Kondo effect in complex mesoscopic structures
• Spin-charge separation in Aharonov-Bohm rings of interacting electrons

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• Comment on "Theoretical analysis of the transmission phase shift of a quantum dot in the presence of Kondo correlations"
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