Intensity of Coulomb Interaction between quasiparticles in diffusive metallic wires

B. Huard (1) , A. Anthore (1) , F. Pierre (1, 2) , H. Pothier (1) , Norman O. Birge (1, 2) , Daniel Esteve (1)

1 QUANTRONICS - Quantronics Group
2 Department of Physics and Astronomy [East Lansing]

The energy dependence and intensity of Coulomb interaction between quasiparticles in metallic wires is obtained from two different methods: determination of the temperature dependence of the phase coherence time from the magnetoresistance, and measurements of the energy distribution function in out-of-equilibrium situations. In both types of experiment, the energy dependence of the Coulomb interaction is found to be in excellent agreement with theoretical predictions. In contrast, the intensity of the interaction agrees closely with theory only with the first method, whereas an important discrepancy is found using the second one. Different explanations are proposed, and results of a test experiment are presented.

Mots clés: electron-electron interactions; phase coherence; energy relaxation; electronic phase coherence; disordered metals

Domaines: Systèmes mésoscopiques et effet Hall quantique [cond-mat.mes-hall]

B. Huard, A. Anthore, F. Pierre, H. Pothier, Norman O. Birge, et al.. Intensity of Coulomb Interaction between quasiparticles in diffusive metallic wires. Solid State Communications, 2004, 131, pp.599. ⟨10.1016/j.ssc.2004.05.020⟩. ⟨hal-00001432⟩