Conductance Fluctuations in a Metallic Wire Interrupted by a Tunnel Junction

Details Conductance Fluctuations in a Metallic Wire Interrupted by a Tunnel Junction Conductance Fluctuations in a Metallic Wire Interrupted by a Tunnel Junction

1997-04-14

arxiv.org/abs/cond-mat/9704113v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

9 pages RevTeX and 4 PS figures (accepted for publication in Physical Review Letters)

Scientific paper

10.1103/PhysRevLett.78.3539

The conductance fluctuations of a metallic wire which is interrupted by a small tunnel junction has been explored experimentally. In this system, the bias voltage V, which drops almost completely inside the tunnel barrier, is used to probe the energy dependence of conductance fluctuations due to disorder in the wire. We find that the variance of the fluctuations is directly proportional to V. The experimental data are consistently described by a theoretical model with two phenomenological parameters: the phase breaking time at low temperatures and the diffusion coefficient.

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