Raman-scattering study of the charge and spin dynamics of the layered ruthenium oxide Ca3Ru2O7

H. L. Liu, S. Yoon, S. L. Cooper, G. Cao, J. E. Crow

Research output: Contribution to journalArticle

67 Citations (Scopus)

Abstract

We report a Raman-scattering study of the relationship among the charge, spin, and lattice dynamics of Ca3Ru2O7. The metal-insulator (MI) transition (TMI48K) in this compound manifests itself as a rapid suppression of low-frequency electronic scattering intensity, reflecting the opening of a charge gap, Δc760 cm-1, and a concomitant softening and broadening of the 438 cm-1 out-of-phase oxygen phonon mode. Furthermore, the transition to antiferromagnetic order below TN56K is associated with the development of a B1g resonance peak near 58 cm-1. We identify this feature as a two-magnon process, based upon which we estimate an in-plane antiferromagnetic exchange coupling of J8.7 cm-1 in Ca3Ru2O7.

Original languageEnglish
Pages (from-to)R6980-R6983
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume60
Issue number10
DOIs
Publication statusPublished - 1999 Jan 1

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Spin dynamics
Exchange coupling
Metal insulator transition
Ruthenium
Lattice vibrations
spin dynamics
Oxides
ruthenium
Raman scattering
Scattering
Raman spectra
Oxygen
oxides
softening
retarding
insulators
low frequencies
oxygen
estimates
scattering

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Raman-scattering study of the charge and spin dynamics of the layered ruthenium oxide Ca3Ru2O7. / Liu, H. L.; Yoon, S.; Cooper, S. L.; Cao, G.; Crow, J. E.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 60, No. 10, 01.01.1999, p. R6980-R6983.

Research output: Contribution to journalArticle

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AU - Liu, H. L.

AU - Yoon, S.

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AU - Cao, G.

AU - Crow, J. E.

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