Raman scattering studies of spin, charge, and lattice dynamics in Ca2−xSrxRuO4 (0 < x < 0.2)

H. Rho, L. Cooper, S. Nakatsuji, H. Fukazawa, Y. Maeno

Research output: Contribution to journalArticlepeer-review

Abstract

We use Raman scattering to study spin, charge, and lattice dynamics in various phases of Ca2−xSrxRuO4. With increasing substitution of Ca by Sr in the range 0 < x < 0.2, we observe (1) evidence for an increase of the electron-phonon interaction strength, (2) an increased temperature dependence of the two-magnon energy and linewidth in the antiferromagnetic insulating phase, and (3) evidence for charge gap development significantly below the metal-insulator transition (TMI), and hysteresis associated with the structural phase change, both of which are indicative of a first-order metal-insulator transition and a coexistence of metallic and insulating components for T < TMI.

Original languageEnglish (US)
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume68
Issue number10
DOIs
StatePublished - 2003

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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