Effect of Magnetic Impurities on Energy Exchange between Electrons
B. Huard (QUANTRONICS), A. Anthore (QUANTRONICS), Norman O. Birge, (QUANTRONICS), H. Pothier (QUANTRONICS), D. Esteve (QUANTRONICS)
TL;DR
This study investigates how magnetic impurities, specifically manganese, influence energy exchange between electrons in silver wires, confirming theoretical predictions about Kondo scattering effects.
Contribution
It provides experimental validation of a theory describing energy exchange mediated by Kondo impurities in metals.
Findings
Quantitative agreement with G"{o}ppert et al.'s theory
Determined impurity concentration via phase coherence time
Measured energy exchange rates consistent with Kondo scattering
Abstract
In order to probe quantitatively the effect of Kondo impurities on energy exchange between electrons in metals, we have compared measurements on two silver wires with dilute magnetic impurities (manganese) introduced in one of them. The measurement of the temperature dependence of the electron phase coherence time on the wires provides an independent determination of the impurity concentration. Quantitative agreement on the energy exchange rate is found with a theory by G\"{o}ppert et al. that accounts for Kondo scattering of electrons on spin-1/2 impurities.
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