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

doi:10.1103/PhysRevB.60.R6980

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

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77 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 (T_MI48K) in this compound manifests itself as a rapid suppression of low-frequency electronic scattering intensity, reflecting the opening of a charge gap, Δ_c760 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 T_N56K is associated with the development of a B_1g 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 J_∥8.7 cm^-1 in Ca₃Ru₂O₇.

Original language	English
Pages (from-to)	R6980-R6983
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	60
Issue number	10
DOIs	https://doi.org/10.1103/PhysRevB.60.R6980
Publication status	Published - 1999
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.60.R6980

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title = "Raman-scattering study of the charge and spin dynamics of the layered ruthenium oxide Ca3Ru2O7",

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 J∥8.7 cm-1 in Ca3Ru2O7.",

author = "Liu, {H. L.} and S. Yoon and Cooper, {S. L.} and G. Cao and Crow, {J. E.}",

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T1 - Raman-scattering study of the charge and spin dynamics of the layered ruthenium oxide Ca3Ru2O7

AU - Liu, H. L.

AU - Yoon, S.

AU - Cooper, S. L.

AU - Cao, G.

AU - Crow, J. E.

PY - 1999

Y1 - 1999

N2 - 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 J∥8.7 cm-1 in Ca3Ru2O7.

AB - 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 J∥8.7 cm-1 in Ca3Ru2O7.

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

Abstract

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