Phonon dispersion measurements of YBa 2Cu 3O 6.15 and YBa 2Cu 3O 6.95 by time-of-flight neutron spectroscopy

Jaiho Chung, T. Egami, R. J. McQueeney, M. Yethiraj, M. Arai, T. Yokoo, H. A. Mook, Y. Endoh, S. Tajima, C. Frost, F. Dogan

Research output: Contribution to journalArticle

Abstract

We measured the phonon dispersions of YBa 2Cu 3O 6.15 and YBa 2Cu 3O 6.95 by time-of-flight inelastic neutron scattering. The in-plane bond-stretching modes in the metallic phase showed a distinct a-b plane anisotropy beyond what is expected for structural origin. Such anisotropy in the longitudinal optical modes, which is absent in the TO, suggests strong in-plane anisotropy in the underlying electronic structure. Apical oxygen bond-stretching modes showed a large frequency change between the insulating and the metallic phases. This large softening also is beyond structural origin, and suggests the effect of local electronic environment.

Original languageEnglish
Pages (from-to)327-330
Number of pages4
JournalJournal of Superconductivity
Volume15
Issue number5
DOIs
Publication statusPublished - 2002 Oct 1
Externally publishedYes

Fingerprint

Neutrons
Anisotropy
Spectroscopy
neutrons
anisotropy
Stretching
spectroscopy
Inelastic neutron scattering
Dispersions
softening
Electronic structure
inelastic scattering
neutron scattering
Oxygen
electronic structure
oxygen
electronics

Keywords

  • In-plane anisotropy
  • MAPS
  • Phonon dispersion
  • Y-based cuprates

ASJC Scopus subject areas

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

Cite this

Phonon dispersion measurements of YBa 2Cu 3O 6.15 and YBa 2Cu 3O 6.95 by time-of-flight neutron spectroscopy. / Chung, Jaiho; Egami, T.; McQueeney, R. J.; Yethiraj, M.; Arai, M.; Yokoo, T.; Mook, H. A.; Endoh, Y.; Tajima, S.; Frost, C.; Dogan, F.

In: Journal of Superconductivity, Vol. 15, No. 5, 01.10.2002, p. 327-330.

Research output: Contribution to journalArticle

Chung, J, Egami, T, McQueeney, RJ, Yethiraj, M, Arai, M, Yokoo, T, Mook, HA, Endoh, Y, Tajima, S, Frost, C & Dogan, F 2002, 'Phonon dispersion measurements of YBa 2Cu 3O 6.15 and YBa 2Cu 3O 6.95 by time-of-flight neutron spectroscopy', Journal of Superconductivity, vol. 15, no. 5, pp. 327-330. https://doi.org/10.1023/A:1021057810930
Chung, Jaiho ; Egami, T. ; McQueeney, R. J. ; Yethiraj, M. ; Arai, M. ; Yokoo, T. ; Mook, H. A. ; Endoh, Y. ; Tajima, S. ; Frost, C. ; Dogan, F. / Phonon dispersion measurements of YBa 2Cu 3O 6.15 and YBa 2Cu 3O 6.95 by time-of-flight neutron spectroscopy. In: Journal of Superconductivity. 2002 ; Vol. 15, No. 5. pp. 327-330.
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AU - McQueeney, R. J.

AU - Yethiraj, M.

AU - Arai, M.

AU - Yokoo, T.

AU - Mook, H. A.

AU - Endoh, Y.

AU - Tajima, S.

AU - Frost, C.

AU - Dogan, F.

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