title: Magnetic-field-dependent quasiparticle energy relaxation in mesoscopic wires.
abstract: In order to find out if magnetic impurities can mediate interactions between quasiparticles in metals, we have measured the effect of a magnetic field B on the energy distribution function f(E) of quasiparticles in two silver wires driven out of equilibrium by a bias voltage U. In a sample showing sharp distributions at B=0, no magnetic field effect is found, whereas, in the other sample, rounded distributions at low magnetic field get sharper as B is increased, with a characteristic field proportional to U. Comparison is made with recent calculations of the effect of magnetic-impurities-mediated interactions taking into account Kondo physics.
authors.affiliation: Service de Physique de l'Etat Condensé, Direction des Sciences de la Matière, CEA-Saclay, 91191 Gif-sur-Yvette, France.
authors.forename: A
authors.initials: A
authors.lastname: Anthore
authors.forename: F
authors.initials: F
authors.lastname: Pierre
authors.forename: H
authors.initials: H
authors.lastname: Pothier
authors.forename: D
authors.initials: D
authors.lastname: Esteve