Resonance Raman scattering as a probe of oxygen dynamics in YBa2Cu3Ox

M. Käll*, M. Osada, J. Bäckström, M. Kakihana, L. Börjesson, T. Frello, J. Madsen, N. H. Andersen, R. Liang, P. Dosanjh, W. N. Hardy

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

We report on the metastable photo-bleaching of the 2.15 eV yellow Raman resonance in oxygen deficient YBa2Cu3Ox (x = 6.35-6.87), extending investigations by Wake et al. (Phys. Rev. Lett., 1991, 67, 3728) for x ≈ 1. Polarization, x dependence and phonon spectra indicate that the resonance is localized at oxygen vacancies in long CuO-chains. The resonance is thermally reactivated from the metastable bleached state with a relaxation time τ∼exp[Δ/kBT] with Δ ≈ 1 eV. The resulting temperature dependent equilibrium resonance intensity essentially mirrors the oxygen superstructure disordering around T* ≈ 100°C observed in the same crystals by hard X-ray diffraction, thus offering a new effective probe of chain-oxygen dynamics in YBa2Cu3Ox.

Original languageEnglish
Pages (from-to)1988-1990
Number of pages3
JournalJournal of Physics and Chemistry of Solids
Volume59
Issue number10-12
Publication statusPublished - 1998 Oct
Externally publishedYes

Keywords

  • Oxygen dynamics
  • Raman resonance
  • YBaCuO

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint

Dive into the research topics of 'Resonance Raman scattering as a probe of oxygen dynamics in YBa<sub>2</sub>Cu<sub>3</sub>O<sub>x</sub>'. Together they form a unique fingerprint.

Cite this