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Incommensurate magnetic order and dynamics induced by spinless impurities in YBa₂Cu₃O6.6

  • Suchaneck, A. Max Planck Institute for Solid State Research, Stuttgart, Germany
  • Hinkov, V. Max Planck Institute for Solid State Research, Stuttgart, Germany
  • Haug, D. Max Planck Institute for Solid State Research, Stuttgart, Germany
  • Schulz, Leander Physics Department and Fribourg Center for Nanomaterials, University of Fribourg, Switzerland
  • Bernhard, Christian Physics Department and Fribourg Center for Nanomaterials, University of Fribourg, Switzerland
  • Ivanov, A. Institut Laue-Langevin, Grenoble, France
  • Hradil, K. Institute for Physical Chemistry, University of Göttingen, Germany
  • Lin, C. T. Max Planck Institute for Solid State Research, Stuttgart, Germany
  • Bourges, P. Laboratoire Léon Brillouin, CEA-CNRS, Gif-sur-Yvette, France
  • Keimer, B. Max Planck Institute for Solid State Research, Stuttgart, Germany
  • Sidis, Y. Laboratoire Léon Brillouin, CEA-CNRS, Gif-sur-Yvette, France
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    10.06.2010
Published in:
  • Physical Review Letters. - 2010, vol. 105, p. 037207
English We report an inelastic-neutron-scattering and muon-spin-relaxation study of the effect of 2% spinless (Zn) impurities on the magnetic order and dynamics of YBa₂Cu₃O6.6, an underdoped high-temperature superconductor that exhibits a prominent spin pseudogap in its normal state. Zn substitution induces static magnetic order at low temperatures and triggers a large-scale spectral-weight redistribution from the magnetic resonant mode at 38 meV into uniaxial, incommensurate spin excitations with energies well below the spin pseudogap. These observations indicate a competition between incommensurate magnetic order and superconductivity close to a quantum critical point. Comparison to prior data on La2-xSrxCuO₄ suggests that this behavior is universal for the layered copper oxides and analogous to impurity-induced magnetic order in one-dimensional quantum magnets.
Faculty
Faculté des sciences et de médecine
Department
Département de Physique
Language
  • English
Classification
Physics
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Persistent URL
https://folia.unifr.ch/unifr/documents/301539
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