4.8 Article

Broken translational and rotational symmetry via charge stripe order in underdoped YBa2Cu3O6+y

期刊

SCIENCE
卷 347, 期 6228, 页码 1335-1339

出版社

AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1258399

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资金

  1. Max Planck-UBC Centre for Quantum Materials
  2. Killam Foundation
  3. Alfred P. Sloan Foundation
  4. Alexander von Humboldt Foundation
  5. Natural Sciences and Engineering Research Council (NSERC)
  6. Canada Research Chairs Program
  7. NSERC
  8. CFI
  9. CIFAR Quantum Materials
  10. NRC
  11. CIHR
  12. Government of Saskatchewan
  13. WD Canada
  14. University of Saskatchewan
  15. CLS Graduate Student Travel Support Program
  16. CIFAR Global Academy

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After the discovery of stripelike order in lanthanum-based copper oxide superconductors, charge-ordering instabilities were observed in all cuprate families. However, it has proven difficult to distinguish between unidirectional (stripes) and bidirectional (checkerboard) charge order in yttrium-and bismuth-based materials. We used resonant x-ray scattering to measure the two-dimensional structure factor in the superconductor YBa2Cu3O6+y in reciprocal space. Our data reveal the presence of charge stripe order (i.e., locally unidirectional density waves), which may represent the true microscopic nature of charge modulation in cuprates. At the same time, we find that the well-established competition between charge order and superconductivity is stronger for charge correlations across the stripes than along them, which provides additional evidence for the intrinsic unidirectional nature of the charge order.

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