Thermal Relaxation of Low-Energy Excitations in Vitreous Silica
- 9 March 1981
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 46 (10), 661-664
- https://doi.org/10.1103/physrevlett.46.661
Abstract
Strong thermal-relaxation effects have been observed in vitreous silica at low temperatures on a time scale of order s, which are attributed to slowly relaxing low-energy excitations intrinsic to the amorphous state. With the use of a simplified version of the tunneling model, a density of states is derived for these excitations, which is comparable in magnitude to the density of the fast-relaxing excitations derived from phonon-scattering experiments.
Keywords
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