Ubiquity of logarithmic scaling, 1/fpower spectrum, and theπ/2rule
- 15 January 1987
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 35 (3), 1465-1468
- https://doi.org/10.1103/physrevb.35.1465
Abstract
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 ‘‘π/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.Keywords
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