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Phonon Dispersion Relations in PrBa2Cu3O6+x (x ~ 0.2)

Abstract:
We report measurements of the phonon dispersion relations in non-superconducting, oxygen-deficient PrBa2Cu3O6+x (x ~ 0.2) by inelastic neutron scattering. The data are compared with a model of the lattice dynamics based on a common interaction 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 interaction potential model.
Publication status:
Published

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Publisher copy:
10.1103/PhysRevB.69.092302

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Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Condensed Matter Physics
Role:
Author
Journal:
Physical Review B More from this journal
Volume:
69
Issue:
9
Pages:
092302
Publication date:
2003-10-23
DOI:
EISSN:
1550-235X
ISSN:
1098-0121
Keywords:
Pubs id:
pubs:22715
UUID:
uuid:abd41f55-182c-46b2-a5a8-50eabea4186e
Local pid:
pubs:22715
Source identifiers:
22715
Deposit date:
2012-12-19

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