Neutron scattering study of phonons in LaCoO3

Yoshihiko Kobayashi, Thant Sin Naing, M. Suzuki, M. Akimitsu, K. Asai, K. Yamada, Jun Akimitsu, P. Manuel, J. M. Tranquada, G. Shirane

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We have investigated phonons with the inelastic neutron scattering in order to study the 100 K spin-state transition (ST) in LaCoO3. The acoustic phonon dispersions show some characteristic features of the folded Brillouin zone (BZ) of the rhombohedrally distorted perovskite structure containing two chemical formula of LaCoO3 in the unit cell. The optical phonons of the Eg rotational modes of O atoms and the Eg vibration mode of La atoms show a remarkable softening above the ST. The softening is most pronounced at R-point of the pseudo-cubic reciprocal lattice but covers almost whole region of the Brillouin zone. In contrast, the acoustic phonons show no such softening associated with the ST.

Original languageEnglish
Pages (from-to)532-533
Number of pages2
JournalPhysica B: Condensed Matter
Volume378-380
Issue numberSPEC. ISS.
DOIs
Publication statusPublished - May 1 2006
Externally publishedYes

Fingerprint

Phonons
Neutron scattering
softening
neutron scattering
phonons
Brillouin zones
Acoustics
Atoms
Inelastic neutron scattering
acoustics
Dispersions
Perovskite
atoms
vibration mode
inelastic scattering
cells

Keywords

  • Inelastic neutron scattering
  • LaCoO
  • Phonon
  • Spin-state transition

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Kobayashi, Y., Sin Naing, T., Suzuki, M., Akimitsu, M., Asai, K., Yamada, K., ... Shirane, G. (2006). Neutron scattering study of phonons in LaCoO3 . Physica B: Condensed Matter, 378-380(SPEC. ISS.), 532-533. https://doi.org/10.1016/j.physb.2006.01.242

Neutron scattering study of phonons in LaCoO3 . / Kobayashi, Yoshihiko; Sin Naing, Thant; Suzuki, M.; Akimitsu, M.; Asai, K.; Yamada, K.; Akimitsu, Jun; Manuel, P.; Tranquada, J. M.; Shirane, G.

In: Physica B: Condensed Matter, Vol. 378-380, No. SPEC. ISS., 01.05.2006, p. 532-533.

Research output: Contribution to journalArticle

Kobayashi, Y, Sin Naing, T, Suzuki, M, Akimitsu, M, Asai, K, Yamada, K, Akimitsu, J, Manuel, P, Tranquada, JM & Shirane, G 2006, 'Neutron scattering study of phonons in LaCoO3 ', Physica B: Condensed Matter, vol. 378-380, no. SPEC. ISS., pp. 532-533. https://doi.org/10.1016/j.physb.2006.01.242
Kobayashi Y, Sin Naing T, Suzuki M, Akimitsu M, Asai K, Yamada K et al. Neutron scattering study of phonons in LaCoO3 . Physica B: Condensed Matter. 2006 May 1;378-380(SPEC. ISS.):532-533. https://doi.org/10.1016/j.physb.2006.01.242
Kobayashi, Yoshihiko ; Sin Naing, Thant ; Suzuki, M. ; Akimitsu, M. ; Asai, K. ; Yamada, K. ; Akimitsu, Jun ; Manuel, P. ; Tranquada, J. M. ; Shirane, G. / Neutron scattering study of phonons in LaCoO3 . In: Physica B: Condensed Matter. 2006 ; Vol. 378-380, No. SPEC. ISS. pp. 532-533.
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