Lattice dynamics and charge ordering in La1-xCaxMnO3 (0.45≤x≤0.76)

S. Naler, M. Rübhausen, S. Yoon, S Lance Cooper, K. H. Kim, S. W. Cheong

Research output: Contribution to journalArticlepeer-review


We study local lattice fluctuations in La1-xCaxMnO3 (0.45≤x≤0.76) by means of inelastic light scattering. Fluctuation effects are especially strong in the intensity variation of Jahn-Teller mode at 480 cm-1 around commensurate doping x≈0.5. The linewidth of the Jahn-Teller mode shows a minimum at x = 0.50 indicating "long-range" lattice and charge commensuration at low temperatures. The electron-phonon interaction is fundamentally changed at the transition to the charge-ordered (CO) state as evidenced by sign and magnitude changes in the Fano parameter. Temperature-dependent data show enhanced fluctuations persisting up to temperatures of at least 2 Tco for x ≈ 0.50.

Original languageEnglish (US)
Article number092401
Pages (from-to)924011-924014
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number9
StatePublished - Mar 1 2002

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


Dive into the research topics of 'Lattice dynamics and charge ordering in La1-xCaxMnO3 (0.45≤x≤0.76)'. Together they form a unique fingerprint.

Cite this