Incommensurate magnetic order and dynamics induced by spinless impurities in YBa₂Cu₃O<sub>6.6</sub>

Suchaneck, A.; Hinkov, V.; Haug, D.; Schulz, Leander; Bernhard, Christian; Ivanov, A.; Hradil, K.; Lin, C. T.; Bourges, P.; Keimer, B.; Sidis, Y.

doi:10.1103/PhysRevLett.105.037207

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Journal article

Incommensurate magnetic order and dynamics induced by spinless impurities in YBa₂Cu₃O_6.6

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

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 YBa₂Cu₃O_6.6, 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 La_2-xSr_xCuO₄ 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

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