Contrasting spin dynamics in Zn- and Ni-doped NdBa2Cu3O6+y single crystals from Cu nuclear quadrupole resonance: Evidence for correlations between antiferromagnetism and pseudogap effects

H.-J. Grafe, F. Hammerath, A. Vyalikh, G. Urbanik, V. Kataev, Th. Wolf, G. Khaliullin, and B. Büchner
Phys. Rev. B 77, 014522 – Published 25 January 2008

Abstract

We report Cu63,65 nuclear quadrupole resonance (NQR) measurements on slightly underdoped NdBa2Cu3O6+y heavily doped by Ni and Zn impurities. Owing to the impurity doping, superconductivity is fully suppressed in both cases. The Ni strongly enhances magnetic correlations and induces a wipeout of the NQR signal comparable to that found in stripe ordered lanthanum cuprates. In contrast, the magnetism is suppressed in the Zn doped sample where no wipeout effect is observed and the nuclear spin relaxation rate is reduced. Our findings are in a striking correspondence with the different impact of Ni and Zn impurities on the charge pseudogap evidenced by recent optical data, uncovering thereby a close relationship between the magnetic correlations and pseudogap phenomena.

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  • Received 5 November 2007

DOI:https://doi.org/10.1103/PhysRevB.77.014522

©2008 American Physical Society

Authors & Affiliations

H.-J. Grafe1, F. Hammerath1, A. Vyalikh1, G. Urbanik1, V. Kataev1, Th. Wolf2, G. Khaliullin3, and B. Büchner1

  • 1IFW Dresden, Institut für Festkörperforschung, P.O. Box 270116, D-01171 Dresden, Germany
  • 2Forschungszentrum Karlsruhe, Institut für Festkörperphysik, D-76021 Karlsruhe, Germany
  • 3Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany

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Vol. 77, Iss. 1 — 1 January 2008

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