Evidence for competing magnetic instabilities in underdoped YBa2Cu3O6+x

V. Balédent, D. Haug, Y. Sidis, V. Hinkov, C. T. Lin, and P. Bourges
Phys. Rev. B 83, 104504 – Published 14 March 2011

Abstract

We report a polarized neutron-scattering study of the orbital-like magnetic order in strongly underdoped YBa2Cu3O6.45 and YBa2(Cu0.98Zn0.02)3O6.6. Their hole-doping levels are located on both sides of the critical doping pMI of a metal-insulator transition inferred from transport measurements. Our study reveals a drop down of the orbital-like order slightly below pMI with a steep decrease of both the ordering temperature Tmag and the ordered moment. Above pMI, substitution of quantum impurities does not change Tmag, whereas it lowers significantly the bulk ordered moment. The modifications of the orbital-like magnetic order are interpreted in terms of a competition with electronic liquid crystal phases around pMI. This competition gives rise to a mixed magnetic state in YBa2Cu3O6.45 and a phase separation in YBa2(Cu0.98Zn0.02)3O6.6.

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  • Received 1 December 2010

DOI:https://doi.org/10.1103/PhysRevB.83.104504

©2011 American Physical Society

Authors & Affiliations

V. Balédent1, D. Haug2, Y. Sidis1, V. Hinkov2,3, C. T. Lin2, and P. Bourges1,*

  • 1Laboratoire Léon Brillouin, CEA-CNRS, CE-Saclay, F-91191 Gif sur Yvette, France
  • 2Max-Planck-Institut für Festkörperforschung, D-70569 Stuttgart, Germany
  • 3Department of Physics and Astronomy, University of British Columbia, Vancouver, Canada V6T 1Z1

  • *philippe.bourges@cea.fr

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Vol. 83, Iss. 10 — 1 March 2011

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