Anomalous phonon damping in insulating cuprates

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

Measurements of the in-plane (κab) and out-of-plane (κc) thermal conductivity for insulating cuprate crystals are discussed along with new measurements for YBa2Cu3O6, and PrBa2Cu3O6, where both κab and κc are twice the magnitude previously reported for this material. An unusual temperature (T) dependence of κab in cuprates with apical oxygen indicates the onset of strong phonon damping for T < 200-250K. Along with dielectric and elastic anomalies reported in this regime, the data suggest the occurrence of a structural phase transition, involving rotations of the CuO polyhedra about an in-plane axis. The role of such local distortions in the thermal transport of superconducting compounds and the superconducting-state enhancement of κab are discussed.

Original languageEnglish (US)
Pages (from-to)457-460
Number of pages4
JournalJournal of Superconductivity
Volume8
Issue number4
DOIs
StatePublished - Aug 1 1995

Keywords

  • Cuprates
  • apical oxygen
  • heat conductivity
  • phonon scattering
  • structural phase transition

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Physics and Astronomy (miscellaneous)

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