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Phonon dispersion relations in PrBa<sub>2</sub>Cu<sub>3</sub>O<sub>6</sub><sub>+</sub><sub>x</sub> (x approximate to 0.2)

Authors
  • Gardiner, C.H.
  • Boothroyd, A.T.
  • Larsen, B.H.
  • Reichardt, W.
  • Zhokhov, A.A.
  • Andersen, N.H.
  • Lister, S.J.S.
  • Wildes, A.R.
Publication Date
Jan 01, 2004
Source
Online Research Database In Technology
Keywords
Language
English
License
Unknown
External links

Abstract

We report measurements of the phonon dispersion relations in nonsuperconducting, oxygen-deficient PrBa2Cu3O6+x (xapproximate to0.2) by inelastic neutron scattering. The data are compared with a model of the lattice dynamics based on a common interatomic potential. Good agreement is achieved for all but two phonon branches, which are significantly softer than predicted. These modes are found to arise predominantly from motion of the oxygen ions in the CuO2 planes. Analogous modes in YBa2Cu3O6 are well described by the common interatomic potential model.

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