Charge density waves in Sr14-x Cax Cu24 O41: Electron correlations versus structural effects

K. Y. Choi, M. Grove, P. Lemmens, M. Fischer, G. Güntherodt, U. Ammerahl, B. Büchner, G. Dhalenne, A. Revcolevschi, J. Akimitsu

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8 Citations (Scopus)

Abstract

We report inelastic light scattering experiments in the spin-chain and ladder system Sr14-x Cax Cu24 O41. A depletion of an electronic background is observed for 0≤x≤5 at low temperatures and with light polarization both parallel to the leg and rung directions. This points to the formation of two-dimensional charge density wave in the ladders. Furthermore, the Ca-substitution dependence of the 305 and 249 cm-1 modes, sensitive to the lattice modulations of the respective chain and ladder system, suggests that the charge dynamics in the ladders is strongly influenced by the structural incommensurability.

Original languageEnglish
Article number104428
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume73
Issue number10
DOIs
Publication statusPublished - 2006
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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