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; B. Keimer

doi:10.1103/PhysRevLett.86.1610

Resonant Spin Excitation in an Overdoped High Temperature Superconductor

Superconductivity 2009-10-31 v3 Strongly Correlated Electrons

Authors: H. He , Y. Sidis , P. Bourges , G. D. Gu , A. Ivanov , N. Koshizuka , B. Liang , C. T. Lin , L. P. Regnault , E. Schoenherr , B. Keimer

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Abstract

An inelastic neutron scattering study of overdoped Bi_2Sr_2CaCu_2O_{8+\delta} $ (T_c = 83 K) has revealed a resonant spin excitation in the superconducting state. The mode energy is E_res=38 meV, significantly lower than in optimally doped Bi_2Sr_2CaCu_2O_{8+\delta} (T_c = 91 K, E_ res =43 meV). This observation, which indicates a constant ratio E_res /k_B T_c \sim 5.4, helps resolve a long-standing controversy about the origin of the resonant spin excitation in high-temperature superconductors.

Keywords

spin excitation overdoped superconductor neutron scattering resonance mode high-temperature superconductor

Cite

@article{arxiv.cond-mat/0002013,
  title  = {Resonant Spin Excitation in an Overdoped High Temperature Superconductor},
  author = {H. He and Y. Sidis and P. Bourges and G. D. Gu and A. Ivanov and N. Koshizuka and B. Liang and C. T. Lin and L. P. Regnault and E. Schoenherr and B. Keimer},
  journal= {arXiv preprint arXiv:cond-mat/0002013},
  year   = {2009}
}

Comments

final version: PRL 86, 1610 (2001)

Resonant Spin Excitation in an Overdoped High Temperature Superconductor

Abstract

Keywords

Cite

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