Rattling motion in β-pyrochlore compounds explored by the millimeter-wave conductivity measurement

Atsutaka Maeda, Kentaro Oba, Yoshinori Imai, Jun Ichi Yamaura, Zenji Hiroi

Research output: Contribution to journalArticlepeer-review

Abstract

Complex conductivity is investigated at 19 GHz and 44 GHz in the normal state in β-pyrochlore materials, AOs2O6 (A = Cs, Rb and K). In Cs material, large enhancement of the quasiparticle (QP) scattering time, τ, is observed at low temperatures, whereas there is no such enhancement in Rb and K materials. This indicates that rattling motion is absent in Cs material, whether in K and Rb materials it plays the role as a scatterer for QPs. In Rb materials, we find charge excitation possibly originated from the rattling motion.

Original languageEnglish
JournalPhysica C: Superconductivity and its applications
Volume470
Issue numberSUPPL.1
DOIs
Publication statusPublished - 2010 Dec 1
Externally publishedYes

Keywords

  • Cavity perturbation
  • Millimeter-wave conductivity
  • Rattling
  • Superconductivity
  • β-Pyrochlore compounds

ASJC Scopus subject areas

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

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