Effect of Magnetic Impurities on Energy Exchange between Electrons

B. Huard, A. Anthore, Norman O. Birge, H. Pothier, and D. Esteve

Phys. Rev. Lett. 95, 036802 – Published 15 July 2005

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 Göppert et al. that accounts for Kondo scattering of electrons on spin- $1 / 2$ impurities.

Received 17 January 2005

DOI:https://doi.org/10.1103/PhysRevLett.95.036802

Authors & Affiliations

B. Huard, A. Anthore^*, Norman O. Birge^†, H. Pothier^‡, and D. Esteve

Quantronics Group, Service de Physique de l’État Condensé, DRECAM, CEA-Saclay, 91191 Gif-sur-Yvette, France

^*Present address: Matériaux et Phénomènes Quantiques, Université Paris 7, 2 place Jussieu, 75251 Paris, France.
^†Permanent address: Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824.
^‡Corresponding author. Electronic address: hpothier@cea.fr

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Vol. 95, Iss. 3 — 15 July 2005

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