Phonon softening in ceramic superconductors

Kosmas Prassides, Matthew J. Rosseinsky, A. JoséDianoux, Peter Day

Research output: Contribution to journalArticlepeer-review

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 languageEnglish
Pages (from-to)393-395
Number of pages3
JournalPhysica B: Physics of Condensed Matter
Volume180-181
Issue numberPART 1
DOIs
Publication statusPublished - 1992 Jun 2

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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