Resonant Spin Excitation in an Overdoped High Temperature Superconductor

H. He, Y. Sidis, P. Bourges, G. D. Gu, A. Ivanov, N. Koshizuka, B. Liang, C. T. Lin, L. P. Regnault, E. Schoenherr, and B. Keimer
Phys. Rev. Lett. 86, 1610 – Published 19 February 2001
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Abstract

An inelastic neutron scattering study of overdoped Bi2Sr2CaCu2O8+δ ( Tc=83K) has revealed a resonant spin excitation in the superconducting state. The mode energy is Eres=38.0meV, significantly lower than in optimally doped Bi2Sr2CaCu2O8+δ ( Tc=91K, Eres=42.4meV). This observation, which indicates a constant ratio Eres/kBTc5.4, helps resolve a long-standing controversy about the origin of the resonant spin excitation in high temperature superconductors.

  • Received 2 February 2000

DOI:https://doi.org/10.1103/PhysRevLett.86.1610

©2001 American Physical Society

Authors & Affiliations

H. He1, Y. Sidis2, P. Bourges2, G. D. Gu3, A. Ivanov4, N. Koshizuka5, B. Liang1, C. T. Lin1, L. P. Regnault6, E. Schoenherr1, and B. Keimer1,7

  • 1Max-Planck-Institut für Festkörperforschung, 70569 Stuttgart, Germany
  • 2Laboratoire Léon Brillouin, CEA-CNRS, CE-Saclay, 91191 Gif sur Yvette, France
  • 3Department of Advanced Electronic Materials, School of Physics, University of New South Wales, Sydney 2052, Australia
  • 4Institut Laue Langevin, 156X, 38042 Grenoble Cedex 9, France
  • 5SRL/ISTEC, 10-13, Shinonome 1-chome, Koto-ku, Tokyo 135, Japan
  • 6CEA Grenoble, Département de Recherche Fondamentale sur la Matière Condenée, 38054 Grenoble Cedex 9, France
  • 7Department of Physics, Princeton University, Princeton, New Jersey 08544

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Issue

Vol. 86, Iss. 8 — 19 February 2001

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