Phonon dispersion relations in PrBa2Cu3O6+x (x approximate to 0.2)

C.H. Gardiner, A.T. Boothroyd, B.H. Larsen, W. Reichardt, A.A. Zhokhov, N.H. Andersen, S.J.S. Lister, A.R. Wildes

    Research output: Contribution to journalJournal articleResearchpeer-review


    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.
    Original languageEnglish
    JournalPhysical Review B Condensed Matter
    Issue number9
    Pages (from-to)092302
    Number of pages4
    Publication statusPublished - 2004


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