X-Ray Diffraction Measurements of a Charge Density Wave in Superconducting Ortho-II YBa2Cu3O6.54 Single Crystals at a Zero External Magnetic Field

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  • J Chang
  • Markus Huecker
  • Niels B. Christensen
  • Ruixing Liang
  • Doug A. Bonn
  • W. N. Hardy
  • U. Ruett
  • Olof Gutowski
  • Martin von Zimmermann
  • Stephen M. Hayden

Colleges, School and Institutes

External organisations

  • University of Bristol


X-ray diffraction measurements show that the high-temperature superconductor YBa2Cu3O6.54, with ortho-II oxygen order, has charge-density-wave order in the absence of an applied magnetic field. The dominant wave vector of the charge density wave is q_CDW =(0, 0.328(2), 0.5), with the in-plane component parallel to the b axis (chain direction). It has a similar incommensurability to that observed in ortho-VIII and ortho-III samples, which have different dopings and oxygen orderings. Our results for ortho-II contrast with recent high-field NMR measurements, which suggest a commensurate wave vector along the a axis. We discuss the relationship between spin and charge correlations in YBa2Cu3Oy and recent high-field quantum oscillation, NMR, and ultrasound experiments.


Original languageEnglish
Article number137004
Pages (from-to)n/a
JournalPhysical Review Letters
Issue number13
Publication statusPublished - 29 Mar 2013