Phonon dispersion measurements of YBa2Cu3O 6.15 and YBa2Cu3O6.95 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 YBa2Cu3O 6.15 and YBa2Cu3O6.95 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 and Novel Magnetism
Volume15
Issue number5
Publication statusPublished - 2002 Dec 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

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Chung, J., Egami, T., McQueeney, R. J., Yethiraj, M., Arai, M., Yokoo, T., ... Dogan, F. (2002). Phonon dispersion measurements of YBa2Cu3O 6.15 and YBa2Cu3O6.95 by time-of-flight neutron spectroscopy. Journal of Superconductivity and Novel Magnetism, 15(5), 327-330.

Phonon dispersion measurements of YBa2Cu3O 6.15 and YBa2Cu3O6.95 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 and Novel Magnetism, Vol. 15, No. 5, 01.12.2002, 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 YBa2Cu3O 6.15 and YBa2Cu3O6.95 by time-of-flight neutron spectroscopy', Journal of Superconductivity and Novel Magnetism, vol. 15, no. 5, pp. 327-330.
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 YBa2Cu3O 6.15 and YBa2Cu3O6.95 by time-of-flight neutron spectroscopy. In: Journal of Superconductivity and Novel Magnetism. 2002 ; Vol. 15, No. 5. pp. 327-330.
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AU - Yethiraj, M.

AU - Arai, M.

AU - Yokoo, T.

AU - Mook, H. A.

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AU - Tajima, S.

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