1. Service de Physique de l’Etat Condensé, Commissariat à l’Energie Atomique, Saclay, F-91191, Gif-sur-Yvette Cedex, France 2. Michigan State University, East Lansing, MI, 48824, USA
Abstract:
We have measured with a tunnel probe the energy distribution function of quasiparticles in the middle of a 1.5 μm-long copper wire placed between two reservoirs at different potentials. We find a distribution function close to half the sum of the Fermi distributions in the reservoirs. The deviation from this behavior is not yet understood.