Comment on ``Point-Contact Study of Fast and Slow Two-Level Fluctuators in Metallic Glasses'' by Keijsers, Shklyarevskii and van Kempen

Details Comment on ``Point-Contact Study of Fast and Slow Two-Level Fluctuators in Metallic Glasses'' by Keijsers, Shklyarevskii and van Kempen Comment on ``Point-Contact Study of Fast and Slow Two-Level Fluctuators in Metallic Glasses'' by Keijsers, Shklyarevskii and van Kempen

1998-01-23

arxiv.org/abs/cond-mat/9801246v1

Physics

Condensed Matter

Strongly Correlated Electrons

1 page Revtex, 1 figure, to appear in Phys. Rev. Lett

Scientific paper

We point out that a recent experiment by Keijsers, Shklyarevskii and van Kempen [Phys. Rev. Lett. 77, 3411 (1996)] on metallic glass point contacts containing two-level systems (TLS) effectively measures for the first time the conductance contributions of individual TLSs (previous experiments averaged over a distribution of TLSs). For this case the predictions of the Kozub-Kulik theory for the TLS-electron interaction differ from those of the Vladar-Zawadowski theory, the latter giving much better agreement with experiment.

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