Abstract
We have measured the thermal conductivity from 2 to 200 K in the superconducting ceramic observing an anomaly at the superconducting transition temperature . Using general arguments and approximations, and supposing that the electrical resistivity is due to electron-phonon interaction, we separate quantitatively the different contributions to . The "observed" electron-limited phonon conductivity fairly follows the Bardeen-Rickayzen-Tewordt theory and a Bardeen-Cooper-Schrieffer-like energy gap with , in agreement with published data from other kinds of measurements.
- Received 23 February 1988
DOI:https://doi.org/10.1103/PhysRevB.38.9220
©1988 American Physical Society