Two Resonant Magnetic Modes in an Overdoped High Tc Superconductor

S. Pailhès, Y. Sidis, P. Bourges, C. Ulrich, V. Hinkov, L. P. Regnault, A. Ivanov, B. Liang, C. T. Lin, C. Bernhard, and B. Keimer
Phys. Rev. Lett. 91, 237002 – Published 3 December 2003

Abstract

A detailed inelastic neutron scattering study of the overdoped high temperature copper oxide superconductor Y0.9Ca0.1Ba2Cu3O7 reveals two-distinct magnetic resonant modes in the superconducting state. The modes differ in their symmetry with respect to exchange between adjacent copper oxide layers. Counterparts of the mode with odd symmetry, but not the one with even symmetry, had been observed before at lower doping levels. The observation of the even mode resolves a long-standing puzzle, and the spectral weight ratio of both modes yields an estimate of the onset of particle-hole spin-flip excitations.

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  • Received 24 June 2003

DOI:https://doi.org/10.1103/PhysRevLett.91.237002

©2003 American Physical Society

Authors & Affiliations

S. Pailhès1, Y. Sidis1, P. Bourges1,*, C. Ulrich2, V. Hinkov2, L. P. Regnault3, A. Ivanov4, B. Liang2, C. T. Lin2, C. Bernhard2, and B. Keimer2

  • 1Laboratoire Léon Brillouin, CEA-CNRS, CE-Saclay, 91191 Gif sur Yvette, France
  • 2Max-Planck-Institut für Festkörperforschung, 70569 Stuttgart, Germany
  • 3CEA Grenoble, DRFMC, 38054 Grenoble Cedex 9, France
  • 4Institut Laue Langevin, 156X, 38042 Grenoble Cedex 9, France

  • *To whom correspondence should be addressed. Electronic address: bourges@bali.saclay.cea.fr

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Vol. 91, Iss. 23 — 5 December 2003

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