Lattice dynamics and charge ordering in (formula presented) (formula presented)

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

Research output: Contribution to journalArticlepeer-review

Abstract

We study local lattice fluctuations in (formula presented) (formula presented) by means of inelastic light scattering. Fluctuation effects are especially strong in the intensity variation of Jahn-Teller mode at 480 (formula presented) around commensurate doping (formula presented) The linewidth of the Jahn-Teller mode shows a minimum at (formula presented) 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 (formula presented) for (formula presented).

Original languageEnglish (US)
Pages (from-to)1-4
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume65
Issue number9
DOIs
StatePublished - 2002

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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