Charge-density wave formation in Sr14-xCaxCu24O41

B. Gorshunov, P. Haas, T. Rõõm, M. Dressel, T. Vuletić, B. Korin-Hamzić, S. Tomić, J. Akimitsu, T. Nagata

Research output: Contribution to journalArticlepeer-review

50 Citations (Scopus)


The electrodynamic response of the spin-ladder compound Sr14-xCaxCu24O41(x=0,3,9) has been studied from radio frequencies up to the infrared. At temperatures below 250 K a pronounced absorption peak appears around 12 cm-1 in Sr14Cu24O41 for the radiation polarized along the chains/ladders (E∥c). In addition a strongly temperature-dependent dielectric relaxation is observed in the kHz - MHz range. We explain this behavior by a charge-density wave which develops in the ladders and produces a phason mode pinned at 12 cm-1. With increasing x the mode shifts up in frequency and eventually disappears for x=9 because the dimensionality of the system crosses over from one to two dimensions, giving way to the superconducting ground state under pressure.

Original languageEnglish
Article number060508
Pages (from-to)605081-605084
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number6
Publication statusPublished - Aug 1 2002
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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