Abstract
The phonon density-of-states of the ceramic superconductors Ba0.6K0.4BiO3, BaPb0.75Bi0.2O3 and BaPb0.75Sb0.25O3 has been measured by the neutron time-of-flight technique to very low energy transfer. Measurements on metallic BaPbO3 and semiconducting BaBiO3 are also reported. Phonon anomalies, associated with high-frequency oxygen breathing modes are observed. The low-frequency region also reveals additional features that vary across the series. The results are consistent with phonon-mediated mechanisms for superconductivity.
Original language | English |
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Pages (from-to) | 393-395 |
Number of pages | 3 |
Journal | Physica B: Physics of Condensed Matter |
Volume | 180-181 |
Issue number | PART 1 |
DOIs | |
Publication status | Published - 1992 Jun 2 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering