Resonant Spin Excitation in an Overdoped High Temperature Superconductor

Preprint

1 February 2000

preprint
Published by arXiv in arXiv

Abstract

An inelastic neutron scattering study of overdoped Bi_{2}Sr_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

HIGH TEMPERATURE SUPERCONDUCTORS
TEMPERATURE SUPERCONDUCTOR
RESONANT SPIN EXCITATION
SUPERCONDUCTORS
SUPERCONDUCTING
SPIN EXCITATION
OVERDOPED

All Related Versions

Version 1, 2000-02-01, ArXiv
Version 2, 2000-02-02, ArXiv
Version 3, 2001-02-13, ArXiv
Published version: Physical Review Letters, 86 (8), 1610.

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