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

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 · Physical Review Letters

T1

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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/kBTc∼5.4, helps resolve a long-standing controversy about the origin of the resonant spin excitation in high temperature superconductors.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	83	Pressure not reported	onset
Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	91	Pressure not reported	onset
YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	93	Pressure not reported	unknown
YBa2Cu0.97Ni0.033O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	80	Pressure not reported	unknown