title: Electrodynamic dip in the local density of states of a metallic wire.
abstract: We have measured the differential conductance of a tunnel junction between a thin metallic wire and a thick ground plane, as a function of the applied voltage. We find that near zero voltage, the differential conductance exhibits a dip, which scales as 1/square root of [V] down to voltages V approximately 10k(B)T/e. The precise voltage and temperature dependence of the differential conductance is accounted for by the effect on the tunneling density of states of the macroscopic electrodynamics contribution to electron-electron interaction, and not by the short-ranged screened-Coulomb repulsion at microscopic scales.
authors: Service de Physique de l'Etat Condensé, Commissariat à l'Energie Atomique, Saclay, 91191 Gif-sur-Yvette, France.
authors: F
authors: F
authors: Pierre
authors: H
authors: H
authors: Pothier
authors: P
authors: P
authors: Joyez
authors: N O
authors: NO
authors: Birge
authors: D
authors: D
authors: Esteve
authors: M H
authors: MH
authors: Devoret