F.J. Himpsel, T.A. Jung, et al.
Surface Review and Letters
For disordered systems governed by activated processes with a broad distribution of barrier heights, the susceptibility should obey logarithmic frequency scaling, and the associated noise power spectrum should be of the 1/f-type (with logarithmic corrections). Further, various /2 rules can be derived from the Kramers-Kronig relationships. The results are valid both near T=0 and near a phase transition when the latter exists. Two new examples of this very general behavior are discussed: the thermal properties of ordinary glasses and the impurity conduction and dielectric response of insulators. © 1987 The American Physical Society.
F.J. Himpsel, T.A. Jung, et al.
Surface Review and Letters
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