Universal conductance fluctuations and low temperature 1/f noise in mesoscopic AuFe spin glasses

Details Universal conductance fluctuations and low temperature 1/f noise in mesoscopic AuFe spin glasses Universal conductance fluctuations and low temperature 1/f noise in mesoscopic AuFe spin glasses

1999-05-27

arxiv.org/abs/cond-mat/9905402v1

Physical Review B, Vol. 62, P. 3905 (2000)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevB.62.3905

We report on intrinsic time-dependent conductance fluctuations observed in mesoscopic AuFe spin glass wires. These dynamical fluctuations have a 1/f-like spectrum and appear below the measured spin glass freezing temperature of our samples. The dependence of the fluctuation amplitude on temperature, magnetic field, voltage and Fe concentration allows a consistent interpretation in terms of quantum interference effects which are sensitive to the slowly fluctuating spin configuration.

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