Frequency and temperature dependence of dielectric and ultrasonic dispersion in amorphous materials at low temperatures
- 15 July 1979
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 20 (2) , 763-767
- https://doi.org/10.1103/physrevb.20.763
Abstract
Changes in ultrasonic velocity and dielectric constant with temperature and frequency in amorphous materials can be explained using the tunneling-states model in the temperature range 0.01 to 20 K, but it is necessary to include explicitly an energy-dependent density of states and a distribution of relaxation times for each tunneling-state energy.Keywords
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