Anomalous thermal conductivity of: Possibility of a polaronic glass
- 1 December 1987
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 36 (16), 8813-8815
- https://doi.org/10.1103/physrevb.36.8813
Abstract
We present measurements of the thermal conductivity of Cu and Cu. The results on the pure sample show that lattice conduction is predominant with a dependence at low temperatures and a strong -independent scattering above 30 K. We observe a similar behavior for the superconductor but with a law at low temperature and a small electronic contribution in the normal state. These results together with the behavior of the specific heat and sound attenuation are consistent with the existence of a two-level tunneling system for an amorphous state.
Keywords
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