Abstract
The thermal conductivity $\ensuremath{\kappa}$ of glassy metals is shown to change reversibly with heat treatment at temperatures ${T}_{A}$ near the glass transition. If the change in $\ensuremath{\kappa}$ is interpreted as resulting from a change in the density $n(E)$ of the two-level states found in amorphous solids, the observed dependence of $n(E)$ on ${T}_{A}$ is in qualitative agreement with a prediction of a free-volume model for the glass transition.
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