Universal conductance fluctuations imply excess high frequency noise in mesoscopic gold wires.

ORAL

Abstract

In cold, mesoscopic conductors, two-level fluctuators lead to time-dependent conductance fluctuations manifested as 1/f noise that are enhanced by quantum interference up to a universal limit (TDUCF). In Au nanowires, we measure the magnetic field dependence of TDUCF, weak localization (WL), and magnetic field-driven (MF) UCF before and after treatments that alter magnetic scattering and passivate surface fluctuators. Our coherence length data resolve a long-standing inconsistency between L$_{WL}$ and L$_{TDUCF}$, and may imply that fluctuators produce high frequency noise in excess of 1/f expectations.

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Authors

  • A. Trionfi

    Rice University Dept. of Physics and Astronomy

  • S. Lee

    Department of Physics and Astronomy, Rice University, Physics and Astronomy, Rice University, Rice University Dept. of Physics and Astronomy

  • Doug Natelson

    Physics and Astronomy, Rice University, Rice University, Department of Physics and Astronomy, Rice University, Rice University Dept. of Physics and Astronomy