Raman study of the orbital-phonon coupling in LaCoO3

A. Ishikawa, J. Nohara, S. Sugai

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118 Citations (Scopus)

Abstract

The effects of the eg orbital order on the phonon modes were investigated by Raman scattering in LaCoO3. Raman scattering has an advantage to find out the change induced by the orbital states, because of Raman activity of all phonon modes are created by the distortion from the cubic perovskite structure. The quadrupole mode shows the anomalous softening, enhancement and broadening as the occupancy of the intermediate spin (IS) state increases. The results show that all Raman active phonon modes are affected by the excitation of IS Co3+ ions and shows anomalous temperature dependence.

Original languageEnglish
Article number136401
Pages (from-to)136401-1-136401-4
JournalPhysical review letters
Volume93
Issue number13
DOIs
Publication statusPublished - 2004 Sep 24

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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