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One-dimensional nature of the magnetic fluctuations in YBa2Cu 3O6.6

Author

Listed:
  • H. A. Mook

    (Oak Ridge National Laboratory)

  • Pengcheng Dai

    (Oak Ridge National Laboratory)

  • F. Dogan

    (University of Washington)

  • R. D. Hunt

    (Oak Ridge National Laboratory)

Abstract

There is increasing evidence that inhomogeneous distributions of charge and spin—so-called ‘striped phases’—play an important role in determining the properties of the high-temperature superconductors. For example, recent neutron-scattering measurements on the YBa2Cu 3O7-x family of materials show both spin and charge fluctuations that are consistent with the striped-phase picture. But the fluctuations associated with a striped phase are expected to be one-dimensional, whereas the magnetic fluctuations observed to date appear to display two-dimensional symmetry. We show here that this apparent two-dimensionality results from measurements on twinned crystals, and that similar measurements on substantially detwinned crystals of YBa2Cu3O6.6 reveal the one-dimensional character of the magnetic fluctuations, thus greatly strengthening the striped-phase interpretation. Moreover, our results also suggest that superconductivity originates in charge stripes that extend along the 𝖻 crystal axis, where the superfluid density is found to be substantially larger than for the 𝖺 direction.

Suggested Citation

  • H. A. Mook & Pengcheng Dai & F. Dogan & R. D. Hunt, 2000. "One-dimensional nature of the magnetic fluctuations in YBa2Cu 3O6.6," Nature, Nature, vol. 404(6779), pages 729-731, April.
    • Handle: RePEc:nat:nature:v:404:y:2000:i:6779:d:10.1038_35008005
    DOI: 10.1038/35008005
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